I ended up buying one from Greenleaf: the kit includes pieces you pop out of pre-cut pieces of wood, and you sand, paint, and glue the thing together before decorating. The kit was not complicated, though the directions are very minimal. Unfortunately, I warped the thin pieces of balsa that are supposed to form the roof by trying to wallpaper them, so my camper is "open air."
Of course, the best part of the project is decorating. I wanted a pink and aqua decor. Recently I finished up this project, and got to assemble all the little details I'd collected.
I imagine this space as a cozy get-away.
I think this seating area needs a few more items: some books and maybe a plant or two.
Here are the pillows I made next to my ipad keyboard for scale. This kit is 1:12 inches.
I also dispensed with the wheels and trailer hitch, instead I perched it on some clearance napkin rings. My camper is all about the interior.