Welcome to the forum . . Yes, it was getting wet (during a thunderstorm) that finally became the last straw for my wife. These small campers are cosy and warm (not to mention dry too!!)
We have a dry trailer (no water in tank), still preferring to be outside for cooking and the other daily activities. That being said we warm our wash water in a small basin that fits into the microwave . . . My DW still chuckles at me when I prepare for cleanup . . . ; )
You'll use the exhaust fan too . . . It cools the camper and removes humidity that will happen when inside over nite.
Happy trails await wishing you safe travels and adventurers.