Hey Robert that's a nice looking rig & a clean slate to work with. We are big campers still using a tent & we have really liked the air mattresses & cots. We have a queen size air mattress with a platform that opens up like an accordian, very comfortable. The kids had cots with the air mattress. If you want to build something I would build a single wood frame that is hinged to the wall. It could hang by chains one at each outside corner fastened to the wall above at an angle. You could go up a few feet & do the same thing, kind of like bunk beds. Your mattress could just stay inside the frame. These could then be folded up & fastened to the wall & locked. I would still use air mattresses because a typical bed mattress could mold or mildew when it got damp. I like the window ideas too, got to have some natural light & ventilation. Keep us posted. Here is what I found on Google Image Folding Trailer Bunk Beds.
This one is bad to the bone.
Edited by Sawdust, January 09, 2014 - 01:52 PM.