I'm in California and have found our AC unit to be used very rarely. It is a bit of an albatross since it isn't low profile and sticks up about 14" from the roof line. The handful of times I have used it was when I was in Las Vegas or Southern California during the summer. I have plans to replace it someday with something low profile and more energy efficient (considering something that will run on battery + solar for a limited amount of time) but money and time make this a low priority.
Considering how much further North you are, you will be fine until you start venturing south. If you have remote start on the vehicle, adding the boot between the truck and camper might be a worthwhile idea for a season or two to get you by in a pinch.
