Growing up we had an Apache hard shell pop up camper. That was the only one I had ever seen and I don't even know if they make them like that anymore. Some old guy at a campground we went to in 1989 really liked it and offered to buy it. When my dad said no, he asked if we wanted to sell our German Shepard to him. I think he was working his way towards making an offer on me before we excused ourselves.
I actually found some pics the exact same model/color one we had. I miss that sucker:
I do all tent camping now because I like the freedom of having more spots and it's easier to pack in and out, but when I get a little older I would consider a pop-up camper again or one of those little tear drop trailers.