Okay, let me clarify. What I'm speaking about is temporarily converting a 1 or 1.5 ton rental box truck into an instant temporary camper.

After I arrive at my destination Bug Out Location, I would set up a campsite, with:

cooking and toilet facilities (campstove and bucket on a table, a porta-potty in a tent) outside.

set up DD1's hospital bed up front, athwartships (behind the stacked/secured books,
run the sofa bed (sleeps 2 but would fit 3) down the port side,
place Armory on port side aft (between rear door and sofa),
store food and other supplies down starboard side,
fit folding chairs around to be used as needed.

DD1's wheelchair would be stored in our lift equipped van at night.