01 What makes it unique
The Rockwood Ultra Lite 2918BH is the big-family bunkhouse of the line — a 35-foot trailer that sleeps seven and is built for families who travel often and stay a while. A private front bedroom anchors one end, a rear bunk room sleeps the kids, and the kitchen and living area sit between, with a single slide opening the main space. It pairs real family capacity with the holding tanks to support it, and has a direct twin in the Flagstaff Super Lite 29DBH.
Its standout numbers are the tanks: 90 gallons of grey and 90 gallons of black, far larger than almost anything else in the Rockwood travel-trailer range, which makes genuinely extended off-grid or boondock family stays practical rather than a constant dump-station hunt. The build is the full Forest River package — six-sided aluminum frame, laminated composite walls, a laminated walkable roof under a lifetime limited roofing warranty, an enclosed heated underbelly, and the standard 200-watt rooftop solar with an 1800-watt inverter.
Unusually for a big bunkhouse it also keeps a healthy payload: at 7,851 pounds dry against a 9,900-pound GVWR it leaves 2,049 pounds of cargo capacity — among the best here — so it carries a full family's gear within its ratings. At this size and weight it needs a three-quarter-ton truck and a full-size site. For large families who want the most capable, longest-legged bunkhouse the Ultra Lite line offers, the 2918BH is the family flagship.
02 Full specifications
Dimensions
- Exterior length
- 35' 5"
- Exterior width
- 8' 0"
- Exterior height
- 11' 2"
- Slide-outs
- 1
Weights
- Dry / unit base weight
- 7,851 lbs
- GVWR (max loaded)
- 9,900 lbs
- Net cargo / payload
- 2,049 lbs
- Hitch / tongue weight
- 920 lbs
Capacities
- Fresh water
- 54 gal
- Grey water
- 90 gal
- Black water
- 90 gal
- Refrigerator
- 12V*
Construction
- Frame
- 6-sided full aluminum
- Walls
- Laminated composite
- Roof
- Laminated walkable · lifetime ltd
- Underbelly
- Enclosed · heated tanks
Running gear
- Axles
- 2 (tandem)
- Hitch
- Bumper Pull
- Suspension
- Dexter Torflex torsion
- Solar
- 200W roof · standard
Galley & bath
- Cooktop
- 3-burner recessed
- Refrigerator
- 12V (size not published*)
- A/C
- 15,000 BTU
- Water heater
- Tankless / gas-electric
Sleeping & layout
- Sleeps
- 7
- Primary bed
- Front queen
- Layout
- Front bedroom, rear bunk room, single slide
- Awnings
- 1
03 Rockwood & Flagstaff floorplan family
Forest River's Rockwood and Flagstaff are near-identical twin lines — the same trailers built on the same chassis, differing mainly in interior décor and badging. They split into two weight classes: the lighter Mini Lite (Flagstaff calls it Micro Lite) and the heavier Ultra Lite (Flagstaff Super Lite). The 2918BH on this page is highlighted; each other profiled plan links to its own page. Across both nameplates and classes the family runs to dozens of floorplans; the highest-demand layouts are detailed here and the rest are catalogued on the line hub.
| Floorplan | Class | Nominal | Sleeps | Notable |
|---|---|---|---|---|
| 2205S | Mini Lite | 24 ft | 2 | Front-bedroom couples, rear bath |
| 2509S | Mini Lite | 26 ft | 7 | Murphy + double bunks, outside kitchen |
| 2520BH | Mini Lite | 26 ft | 5 | Double-bunk family, U-dinette |
| 2523MBR | Mini Lite | 26 ft | 2 | Mid-bedroom rear-bath couples, dual slide |
| 2606WS | Ultra Lite | 30 ft | 3 | Rear-bath couples, wardrobe slide |
| 2706BH | Ultra Lite | 33 ft | 5 | Step-up bunkhouse family |
| 2918BH | Ultra Lite | 35 ft | 7 | Big-family bunkhouse, 90/90 tanks |
| 2906RL | Ultra Lite | 35 ft | 3 | Rear-living couples flagship |
Every Rockwood and Flagstaff travel trailer carries a six-sided full-aluminum frame, fully laminated composite walls, a laminated walkable roof with a lifetime limited roofing warranty, an enclosed heated underbelly and a standard 200-watt rooftop solar package with a 1800-watt inverter. Lengths, weights and equipment change with options and model year — always confirm against the unit's own weight sticker. Additional Mini Lite / Micro Lite and Ultra Lite / Super Lite floorplans are documented on the line hub.
04 What owners & reviewers report
Sleeps seven with real separation
A private front bedroom and a rear bunk room at opposite ends of 35 feet give a big family room and privacy — the line's top family-capacity plan.
Exceptional 90/90 holding tanks
Ninety gallons each of grey and black — far larger than most of the range — make extended off-grid family stays genuinely practical.
Big-bunkhouse payload that holds up
At 2,049 lb of payload it carries a full family's gear inside its ratings — uncommon for a bunkhouse this size.
Needs a 3/4-ton and a full site
At 7,851 lb dry and a 9,900-lb GVWR, plan on a three-quarter-ton truck and a full-size site — verify tow ratings before buying.
05 How it compares
The 33-foot bunkhouse sleeping five — lighter and cheaper, easier to tow and place, with smaller tanks.
The same trailer in Flagstaff trim — identical chassis and specs, different décor. Compare both nameplates' pricing.
The value big-family bunkhouse — cheaper and lighter, with less standard equipment and smaller tanks.