I’m not sure they make truck campers with a 5 ft bottom footprint - but they do make them with a 6.5 foot base... so there ya go.

I wanted the option to put a camper back there, and I do end up hauling around tons of equipment and materials for the property management stuff we do...

I tried to do it with my Double Cab Tacoma with a 5 ft bed, so the extra bed is all good.