check out popupportal.com hybridexplorer.com
many manufactures make these 3 bed models but i dont know if they actually can store clothes, towels, and food for more than four occupants.
Our 21ft bunkhouse hybrid that sleeps six ( 2 tents, rear perpendicular bunkbed) has one veritical pantry(food/towels) and under bunk storage for clothes. Under no way can a family of 4 pack enough clothes or food for a week ( it maxes out in a weekend). One kid get sick or wet the bed and and nightmare begins. We have extra sheets and linens up on the upper bunk and keep dirty clothes up there.
