- SALE PRICE: $42,995
- List: $46,500
- You Save: $3,505
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40ft long
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14,240 lbs
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Sleeps 6
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5 slides
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Rear Living AreaRear Entertainment
3791 RD Floorplan
Specifications
| Sleeps | 6 | Slides | 5 |
| Length | 40 ft 5 in | Ext Height | 13 ft 4 in |
| Hitch Weight | 2620 lbs | Dry Weight | 14240 lbs |
| Cargo Capacity | 2360 lbs | Fresh Water Capacity | 66 gals |
| Grey Water Capacity | 88 gals | Black Water Capacity | 49 gals |
| Tire Size | 16" | Furnace BTU | 35000 btu |
| Available Beds | Queen | Refrigerator Type | Residential French Door |
| Refrigerator Size | 18 cu ft | Convection Cooking | Yes |
| Cooktop Burners | 3 | Shower Size | 48" x 30" |
| Number of Awnings | 1 | Axle Weight | 7000 lbs |
| LP Tank Capacity | 30 | Water Heater Capacity | 12 gal |
| Water Heater Type | DSI Gas/Electric | AC BTU | 30000 btu |
| TV Info | LR 50" LED HDTV, BR 32" LED HDTV | Awning Info | 17' Electric with LED Lights |
| Axle Count | 2 | Washer/Dryer Available | Yes |
| Number of LP Tanks | 2 | Shower Type | Shower w/Seat |
| Electrical Service | 50 amp | VIN | 4YDF37928M4703971 |
Description
Elevate Every Road Trip with the Pre-Owned 2021 Keystone RV Montana 3791 RD — Available at Lazydays RV powered by Campers Inn RV
If you’re ready to take your RV lifestyle to the next level, the Pre-Owned 2021 Keystone RV Montana 3791 RD is the luxurious, adventure-ready fifth wheel you’ve been searching for. Built for comfort, crafted with premium materials, and designed for real-world travel, this Montana model delivers exceptional living space, high-end features, and thoughtful touches you’ll appreciate from the very first journey.
Why the 2021 Keystone RV Montana 3791 RD Is a Standout Choice
Expansive Rear Den Floorplan
The 3791 RD floorplan is one of Montana’s most coveted layouts because it features a full rear den that introduces flexible living space. Whether you’re hosting guests, relaxing after a scenic hike, or working remotely, this smartly designed area adapts to your lifestyle with style and comfort.
Residential-Style Interior
Step inside and you’ll feel like you’re in a luxury vacation home. The Montana 3791 RD features elegant décor, premium cabinetry, solid surface countertops, and high-quality finishes throughout. Oversized windows fill the interior with natural light and bring the beauty of the outdoors inside—perfect for sunrise coffee or sunset dinners.
Chef-Ready Kitchen for On-the-Road Cooking
Cooking on the road is a delight with the Montana’s well-equipped kitchen, which includes:
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A three-burner range with oven
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Spacious residential-style refrigerator
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Deep under-mount sink
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Ample cupboard and pantry space
You can whip up everything from grilled favorites to full-course meals with ease and convenience.
Private Master Bedroom Retreat
At night, retreat to your peaceful bedroom with a comfortable queen- or king-size bed and generous wardrobe storage. The private sleeping quarters provide the rest and relaxation you deserve after a full day of travel or exploration.
Full Bath with Spacious Shower
The full bathroom offers a residential-style shower, vanity sink, and plenty of storage for toiletries and linens. This setup makes daily routines simple, efficient, and comfortable—no compromises while on the road.
Built for Durability and Long-Distance Touring
Keystone builds the Montana series with strong construction, reliable components, and quality insulation, giving you confidence and comfort regardless of destination or season. With intelligent exterior storage and easy access compartments, packing gear for every adventure is a breeze.
Reasons to Buy This Pre-Owned 2021 Model
Exceptional Value and Lower Investment
Opting for a pre-owned 2021 Montana 3791 RD lets you enjoy many of the same high-end amenities as a new unit but at a substantially lower cost. You get impressive value for your money and more features included for the price.
Reduced Depreciation Impact
Most RVs experience their steepest depreciation in the first few years. By purchasing this gently used 2021 model, you benefit from reduced depreciation while still owning a modern, feature-rich fifth wheel.
Well-Maintained and Road-Ready
This pre-owned unit has already proven itself on the road and has been cared for properly. With professional inspection and dealer preparation, you can trust it’s ready for your next adventure from the moment you hitch up.
Why Buy from Lazydays RV powered by Campers Inn RV
Nationwide Inventory and Variety
Lazydays RV powered by Campers Inn RV offers one of the largest selections of high-quality pre-owned RVs in the country. You’ll find a wide range of makes, models, and floorplans—making it easier than ever to find a coach that perfectly matches your needs.
Expert Guidance from RV Specialists
Their team of RV professionals knows fifth wheels inside and out. They’ll walk you through detailed feature comparisons, help you understand floorplans, and assist you in choosing a coach that fits your lifestyle and travel goals without pressure or uncertainty.
Comprehensive Inspection and Preparation
Every pre-owned RV goes through a thorough inspection process, including mechanical checks and dealer preparation. That means the Montana 3791 RD is not only hand-selected for quality but also carefully prepared to provide dependable performance and peace of mind.
Flexible Financing and Ownership Solutions
Lazydays RV powered by Campers Inn RV provides a variety of financing options and protection plans designed to fit diverse budgets and ownership styles. Their finance experts work with you to find terms that make ownership easier and more accessible.
Features
Standard Features (2021)
Keystone Exclusives
- Color-coded unified wiring standard
- 4G LTE and Wi-Fi prep
- Tuf-Lok™ thermoplastic duct joiners
- KeyTV™ multisource signal controller
- In-floor heating ducts
- Tru-fit™ slide construction
Exterior
- 12" I-beam w/ z-frame technology
- Road Armor™ shock absorbing hitch pin
- Hitch Vision™ w/ LED lighting
- 2" thick CNC routed, dual-layered lauan, high-gloss fiberglass sidewalls w/ double laminated & insulated rear wall
- Frameless tinted safety glass windows
- Dual pane frameless windows w/ safety tint (Optional)
- MaxTurn™ front cap w/ KeyShield™ automotive-grade paint
- Fully walkable roof w/ Alpha seamless TPO membrane system and 5" rafters
- Rear ladder
- Hydraulic slideouts on main level w/ individual selector valves & electric slideouts on upper deck
- Insulated underbelly w/ forced hot air & electric tank heaters
- 7000 lb Dexter Gladiator® thick wall axles w/ upgraded springs & Nev-R-Adjust® brakes
- Road Armor™ suspension w/ 360° vibration control
- Premium Sailun G-rated tires w/ 6-year manufacturer warranty & Tredit Care Plus roadside assistance
- Spare tire
- Ground Control® 6 point hydraulic auto-leveling w/ hitch memory
- 6' 4" tall 30" wide entry door w/ screen defender & friction hinge
- MORryde® Step Above® entry steps w/ strut assist
- Large pass through storage w/ oversized slam latch door (Select Models)
- MORryde® premium oversized rear steel slide out storage tray (Select Models)
- Side & back-up camera prep
- 2nd battery disconnect dedicated to residential refrigerator (inverter models)
- Water connections, black tank flush, outside shower w/ quick connect hose, winterization kit, water heater bypass, power tank fill, waste & water handle valves, 110V outlet, shutoff valve, 12V compartment light, enclosed low point drains, unit battery disconnect, intuitive KeyTV™ satellite/cable/ antennae source control
- Generator prep (Optional)
- LP generator (Optional)
- Seamless roto-cast holding tanks
- Outdoor kitchen (Select Models)
- Pull-out exterior kitchen (Select Models)
- 50 Amp electrical service w/ detachable cord & 110v exterior outlet
- Outside shower w/ quick disconnect hose
- Dometic 12V electric patio awning(s) w/ LED lights and awning arm power strip
- 2nd Dometic 12V electric patio awning(s) w/ LED lights and awning arm power strip
- Slide-out awning package (Optional)
- 3000 lb towing hitch (Select Models)
- 300 lb accessory hitch (Select Models)
- Solar panel prep w/ (5) inverted outlets
Weather Protection
- Four Season Living Package
- 12v heat pads on holding tanks
- Astrofoil insulated slide floors & underbelly
- Dual attic vents
- Heated and enclosed underbelly, convenience center, & dump valves
- Reflective foil insulated front cap
- Tested and approved for 0° usage
Interior
- Beauflor® vinyl throughout & Syntec® woven flooring in main slideouts
- Hardwood Modern Maple glazed decorative slideout fascia
- Dual day/night roller shades
- Hardwood decorative valance package
- Modern Maple hand-glazed hardwood cabinetry, stiles, & framing
- Thomas Payne Collection theater seating w/ massage, heat, electric recliners & tri-fold hide-a-bed sofa(s)
- Decorative backlit crown molding in living area, hardwood base molding in hallway and living area
- 5000 BTU decorative fireplace heater
- Central vacuum
Kitchen
- Full extension ball bearing drawer glides, hidden cabinet hinges
- LG® solid surface kitchen countertops
- Oversized 70/30 deep stainless steel sink / removable solid surface sink covers
- High-rise pull down faucet
- Free standing legless dinette w/ leaf, chair buddy strut, pop-up USB & 110 V outlets, (2) luxury chairs, (2) folding chairs
- Kitchen power vent fan w/ rain sensor
Bathroom
- Decorative seamless vanity w/ stainless steel sink(s)
- Residential 30" X 48" fiberglass shower w/ decorative glass enclosure, skylight, & molded accessory/foot shelf
- Porcelain foot flush toilet
- Bathroom power vent fan w/ rain sensor
Bedroom
- 60" x 80" full size queen bed
- King size bed (Optional)
- Bed side ceiling lights
- USB & 110V outlets bedside
- Renovo Sleep memory foam mattress, contemporary decorative headboard w/ 48" x 12" window, Vista Stone bedspread & pillow package
- Wood TV cabinet w/ 32" LCD TV
Appliances & Utilities
- (2) 30 lb LP tanks w/ auto changeover
- Coleman Mach power saver ducted 15K BTU Whisper Quiet Cool A/C
- Coleman Mach power saver ducted 15K BTU Whisper Quiet Cool A/C w/ heat pump
- 3rd A/C prep
- CX3 package: 15K BTU free delivery optional third AC (Optional)
- 35K BTU furnace
- 12 gal. gas or electric quick recovery water heater
- 50" LCD TV & AM/FM/DVD/USB stereo w/ 3 zone volume control
- Norcold 18 cu. ft. RV refrigerator (Select Models)
- 18 cu. ft. residential refrigerator w/ 2000w inverter (Select Models)
- Residential size stainless steel convection microwave
- Suburban 22" Elite Series gas cooktop and oven w/ glass cover
- Stackable washer/dryer prep
- Pendant style island light w/ ceiling treatment
Safety
- Breakaway switch
- GFI receptacles
- CO detector
- Smoke detector
- Propane gas leak detector
- Fire extinguisher
Legacy Edition Package
- Dexter® disc brakes (Optional)
- Furrion Vision S side & rear observation system (Optional)
- Electric power cord reel (Optional)
- Surge protector (Optional)
- Legacy generator prep (Optional)
- Rear fiberglass cap (Select Models)
- iN-Command® Generation 3 w/ Global Connect (Optional)
See us for a complete list of features and available options!
All standard features and specifications are subject to change.
All warranty info is typically reserved for new units and is subject to specific terms and conditions. See us for more details.
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*All calculated monthly payments are an estimate for qualified buyers only and do not constitute a commitment that financing or a specific interest rate or term is available. Financing terms may not be available in all Campers Inn locations. Campers Inn RV Sales is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes sales tax, registration tags, and delivery fees. Manufacturer pictures, specifications, and features may be used in place of actual inventory in stock on our lot. Please contact us for availability as our inventory changes rapidly.
Manufacturer and/or stock photographs may be used and may not be representative of the particular unit being viewed. Where an image has a stock image indicator, please confirm specific unit details with your dealer representative.
Manufacturer and/or stock photographs may be used and may not be representative of the particular unit being viewed. Where an image has a stock image indicator, please confirm specific unit details with your dealer representative.



