I have stayed in a pop up camper on a few occasions and I think it is really a lot easier to just pitch a tent. The camper is not much more comfortable and it is a lot of gear to haul into the outdoors. Even a massive tent can fit into the trunk of a sedan.
Plus you can get a really comfortable nights sleep in a tent. If you have a good pad or even an air mattress you do not know that you are sleeping on the ground at all. There are electric fans that can keep the air cool. I just don't see the advantage of the camper.