Bears?

In some parts of the country I'd recommend staying in campgrounds with bear boxes available for campers. Yes a determined bear can rip their way into most RVS if they choose to do so but it would be like breaking into a paper sack for a hybrid with bunk ends extended. If you turtle, you would have no issues not faced by everyone else. Keep in mind that MOST actual CAMPGROUNDS will have a number of folks in tents scattered around the campground and you're a few steps above them when it comes to bears.