Size matters! There are places out here that you can't take a trailer at all, and more where you can't park one if you got it there. There are other places (like the best parts of the Mojave) where the roads are terrible and a typical trailer won't make it. My XL popup trailer is a prissy weak-axled thing. Even so, it's gone through NFS campgrounds where I've seen other popups bottom out (which is pretty sad! We've only done an axle flip so we could get the thing up the driveway). We take a narrow, no-basement pop-up slide-in camper when we want to get further out. A 7-wide truck camper can go anywhere a (somewhat large) truck can. Some of the better manufacturers actually insulate them and include good-sized water tanks. Just plan on doing your entertaining outside.