Putting the bed across the front you need to make the camper pretty wide. I thought about mounting a futon type down one side then the whole kitchen in front of the shower on the other and make it removable with legs so it can be an outside camp kitchen.
I would be a little concerned with a body lift and a camper.
Has anyone had experience with the combination?
You know, your not saving much over a normal popup truck camper, yours looks to be as tall, you might as well add the cabover, they make storage under the beds up there now so you can use it as storage or simply a way to not need to convert the seat into a bed for sleeping. Could just buy an old camper like I did and save some time. I don't have a problem building something like this but it does take time, by buying an old one I get to use it some while I'm rebuilding it
You may want to check out my blog, I have a post from the 1955 Popular Mechanics Encyclopedia Set, about building a House Trailer for your truck, plus other pics of similar units I found throughout the year surfing the web.
http://sportsmanmattoutdoors.blogspot.com/2009_01_01_archive.html
I am doing a similar thing in the next year or two, depending on time off and how much initial cost to building a shell would cost me, along with availability of good lumber and parts. Only problem I'm having with mine right now is the propane storage issue, which may be solved with a simple cabinet and vented doors.
Good luck, love the sketches.