2026 Forest River Campsite Ultra19KB

The Campsite Ultra 19KB has 2,442 lbs of cargo capacity between 5,158 lbs dry and its 7,600 lbs GVWR, 32% of that rating; filling its 52-gallon fresh tank at 8.3 lb a gallon uses 432 lbs of it (how to read trailer weights).

Tongue weight is 600 lbs, 12% of the dry weight as published; it rises as the trailer is loaded and counts against the tow vehicle’s tongue-weight and payload limits (tongue weight by size).

Off hookups: 66 gallons of grey and black capacity against 52 gallons of fresh water, so fresh water runs out first (tank sizes by length).

Against the rest of the Campsite Ultra roster this is the 1st of 6 floorplans by dry weight, in a line that runs from 5,158 lbs to 6,923 lbs. It is the lightest plan in the line, which makes it the one to look at first if the tow vehicle is the constraint.

Plan the tow on loaded weight, not the 5,158 lbs dry figure: half the published cargo capacity brings this plan to about 6,379 lbs, and the published GVWR of 7,600 lbs is the limit (how to read trailer weights).

Forest River’s line listing and this floorplan’s own factory page agree on all 4 shared figures. Dry weight plus cargo capacity equals the published GVWR exactly. A missing row means Forest River does not publish that figure (how figures are verified).

Forest River's own description of this floorplan reads: “Nimble, lightweight, and perfect for couples who want to leave a small footprint, the Campsite Ultra 19KB is one of Campsite’s smallest campers yet feels cozy and capable. The 19KB is one to see for yourself. The classic front bedroom, rear bath floorplan is just right for two hitting the road.” That is the factory's marketing copy rather than a specification, and nothing in it is treated as a verified field on this page - layout descriptions, sleeping arrangements and feature claims in factory copy are not carried into the spec table unless the factory also publishes them as specifications.

How the 19KB differs from the other five Campsite Ultra floorplans. Most distinctive first. How these ranks are worked out.

• Dry weight, 5,158 lb: lightest of six; next is the 21DF (5,688 lb).
• GVWR, 7,600 lb: lowest of six; next is the 26CJL (7,674 lb).
• Cargo capacity, 2,442 lb: largest of six; next is the 21DF (2,107 lb).
• Cargo capacity as a share of GVWR, 32.1%: largest of six; next is the 21DF (27%).
• Tongue weight, 600 lb: lightest of six; next is the 26CJL (674 lb).
• Length, 22 ft 4 in: shortest of six; next is the 21DF (25 ft 10 in).
• Tongue weight as a share of dry weight, 11.6%: third-smallest of six, between the 25JT (10.8%) and the 26TH (12.6%).
• Black tank, 28 gal: smallest of six, level with the 21DF and 25JT; next are the 26BW and 26CJL (38 gal).
• Exterior height, 10 ft 7 in: shared with the 25JT and 26CJL; of six, one lower and two taller, nearest the 21DF (10 ft 6 in) and the 26BW and 26TH (10 ft 8 in).

Next to the 21DF, the nearest heavier floorplan by dry weight, the 19KB is 530 lb lighter by dry weight, has a GVWR 195 lb lower, has 335 lb more cargo capacity, has a tongue weight 195 lb lighter, is 3 ft 6 in shorter and stands 1 in taller; the two publish the same fresh tank, grey tank and black tank.

Campsite Ultra is the tightest roster on this site by loaded rating: GVWR spans just 7,600 to 7,985 lb across all six floorplans, a 385 lb spread. What actually varies is what the trailer spends that rating on. Dry weight runs 5,158 to 6,923 lb and cargo capacity runs 927 to 2,442 lb, so the lightest plan carries more than two and a half times the payload of the heaviest one at almost the same loaded weight. Tongue weight runs 600 to 985 lb. For a buyer, the real decision on this line is how much of the tow vehicle’s rating is left for gear.

A full 52-gallon fresh tank is about 432 lb of water (water counts as cargo: 49 CFR 571.110 S9.3.2), 18% of the 19KB’s 2,442 lb cargo capacity, leaving 2,010 lb. Across 6 Campsite Ultra floorplans the water share runs 18% to 47%, and this plan’s is the lowest. Nearest on that share: Campsite Ultra 21DF at 20%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.110 S9.3.3).