@Ethan N , I think this is probably more for long term overlander living in a campershell, type of thing. I have seen many posts from full timeers on how hard it is to keep dust and dirt out, and clean it up. In small space, folks end up sitting on floor, shoes on benches and seats, etc. I can see a small vac being super useful to keep the place orderly.
If I was spending 2 or 3 nights out, no problem, but my wife vacuums some part of the house every single day, there would be no week long trips for her without some easy way to clean up. And as a dude who constantly has to sweep rocks and dirt and wood chips from his pickup bed, sweeping just doesnt cut it. ;)