As a single traveler I've decided to just use the roll-away bed I already have. It's 73" long, 30" wide and 10" off the floor. With the LWB that gives 10" of usable storage between the bed and door. Metal construction with proper ventilation for the mattress and easily removable as this is my daily driver. Being a minimalist I'm not looking to putting up wood siding on the ceiling and walls. I'll use a portable AC vented thru the passenger window or small electric heater, depending on the weather. I've got little desire at my age for much boondocking. I do have a SoGen to provide power when I'm off grid but I don't expect to use it much. I also have a cheaper 12V fridge.