Yea. We have a minivan, pretty large space without seats. So we’ve thought about sleeping in it (maybe even with twin mattress). My husband uses a CPAP but he has a battery he could use. My concern is getting up to use the restroom, trying not to make a lot of noise with the door - would likely climb to the front.
Some people who sleep in their vehicle stash their extra stuff in a small tent. Or have a rooftop carrier.
Lots of rooftop tent options too, one example shown.
