I usually leave it plugged in overnight, but if I’m up early, I’ll unplug it just to be considerate. Definitely a good idea to peek for any signs or instructions from the hotel, though!
Oh hell yes it does!! The one closest to us seems to be more expensive than my previous shop. So I try to do thing myself when I can. Shop around to get the best deal.
Personally I like keeping the frunk liner in. It's great for hauling stuff from the grocery store – keeps all your bottles and jugs from rolling around. I also throw a roll of paper towels and some glass cleaner in there. Keeps everything neat and tidy!
Unless you've got toddlers running around...