2026 RockwoodUltra Lite 2918BH

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.

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.

This floorplan carries its water comfortably. A full 54-gallon fresh tank is roughly 22% of the 2,049-pound cargo capacity, leaving the Ultra Lite 2918BH with a usable gear budget even when you tow full.

The published dry tongue weight of 920 pounds is 12% of the 7,851-pound dry weight, which sits inside the 10–15% band usually quoted for stable towing. It is still a dry figure: loading the front pass-through and the fresh tank both push it up.

Nothing above changes the ceiling. Loaded to its 9,900-pound GVWR the Ultra Lite 2918BH is towing 2,049 pounds more than its 7,851-pound dry figure, and that is the number your vehicle has to be rated for — not the brochure weight.

Tank balance is generous here: 54 gallons of fresh against 90 grey and 90 black, so waste capacity keeps pace with supply and the fresh tank is the constraint that ends a dry stay.

Ranked by GVWR, the Ultra Lite 2918BH sits 7 of 8 in the Rockwood & Flagstaff line: 9,900 pounds against a line that runs from 6,794 to 9,989 pounds. That position is the useful thing to know, because the plans immediately either side of it are the real alternatives.

Either side of it in the same line: Rockwood & Flagstaff Ultra Lite 2706BH is 1,310 pounds lighter at 8,590 lb GVWR; and Rockwood & Flagstaff Ultra Lite 2906RL is 89 pounds heavier at 9,989 lb GVWR.

Against the Ultra Lite 2918BH: the Puma Tracks 3070RKLS is 6 lb lighter and 2 ft longer; the Westbrook Luxury 305DBLC is 25 lb heavier and 2 ft longer; the Coachmen Catalina 293TQBSCK is 32 lb lighter and sleeps 3 more. Those are differences in the published numbers only — what they cost, how they are built and how they live are separate questions each of those pages answers on its own terms.

Those are the nearest travel trailers from other lines by weight — one per line, picked by proximity on that figure and nothing else. They are listed so the same tow vehicle can be checked against real alternatives, not because they are equivalent inside; layout, build and price diverge sharply across that group.

For scale, the Rockwood & Flagstaff floorplans profiled here run 5,132 to 8,149 pounds dry and 24 to 35 feet of exterior length across 8 plans. Where a floorplan falls in that spread usually says more about which vehicle can tow it, and which site it fits, than the layout name does.

Every profiled floorplan in this line, with the full weight table, is on the Rockwood & Flagstaff line hub.

This catalog tracks 18 specification fields per floorplan. Named sources publish 16 of them for the Ultra Lite 2918BH. The rest are not shown, because the alternative is reading a figure across from a sibling floorplan or from what the segment usually does — and a number nobody published is worth less than an admitted gap.

Not published for this floorplan: interior height, tire specification. If you find one of these in a manufacturer document for this plan, it belongs on this page.

The completeness figure at the foot of this page (95%) measures the same thing on the full field set: it is a measurement of how much this floorplan’s manufacturer publishes, not of how much research went into the page.

Values on this page carrying an asterisk were derived by arithmetic from published figures, or come from a single source, rather than being printed directly by the manufacturer. The flag travels with the number into the downloadable spec sheet.

How every figure here was sourced and checked is set out on the methodology page.