Thank you dastrom, You bring up so much I did not consider. If you could make the whole bottom half as wide as the wings, you now have a 8' X 6" floor plan to reconfigure if wanted. Cabinets can now extend all the way to the floor, and I would think this could be a stronger and simpler design as well.
Might be fun to try and do a version without so much cabinetry, maybe a bigger, van-like open floor plan so you can pack as little or as much as you like inside. Dinette could be eliminated as well. Hmm, might be time to break out the sketchup and do some 3D modeling.
Would be a lot of work, and I need a camper first, and a flatbed on my pickup, but there are many possibilities.