I'm planning to build a 'Murphy Bed' over the passenger side rear wheels. It'll have a desk/table that folds down off the bottom when it's folded against the wall. The kids have Captain chairs which recline flat, and they can spin them rearward to rest their feet on the foot of the double bed. I've got a 12V cooler installed in one of the existing cabinets. Cooking will be outside under the rear mounted awning.
I want to cut down the 8' wide awning that came on the Ambo so that it doesn't stick out beyond the width of the truck (more like a 7' awning). It cranks out about 4' and doesn't require any supports. If I get fancy, I'll have some sort of table that folds down or mounts to the back for cooking... but more likely I'll back it up to a picnic table and call it a day.
The rig is already wired for 110v, heat, and lights... not much more to do other than bring a shovel and a roll of 2 ply.
I'm not planning on a true camper, more of a hard sided tent with an 8" thick memory foam mattress. It'll have a minimalist camper, but that will allow for maximum function as an office, hauler, and generally handy vehicle. Every design has it's trade offs... In our case, why limit function for the entire year for something that we'll only use a few days of the year.