That makes sense in a way I never thought of before. I have a very binary thinking on road trips and overnight sleeping. It's either motel or camping. I have slept for maybe one or two hours in a car seat, but never thought about overnight sleeping in a seat. I have slept under the rear bumper of the Jeep with a sleeping bag and canvas cover. It did rain that night, but not too bad.
When I had a GMC 2500 PU with a shell, I would just go in the bed with the air mattress and sleeping bag. Took all of 30 seconds to have a bed to sleep on. With a Jeep, in my mind there just isn't much room inside to do much of anything.