Much more costly, but I love my trailer! Room for 4, room to stand, mattresses to sleep on,.. although I would like to upgrade them a little...i think they're fine for most people, but my fat butt and bad back could use a little more comfort. Fully contained, and I cab haul all kinds of stuff on top of I want/need to.
This was actually my first thought. Depending on the model I could keep everything other than food/drinks ready to go. Just hook up, toss a few duffel bags on top if needed, and go. Having my SUV basically empty inside would make the dogs and boys more comfortable. Unfortunately this has a few drawbacks. First, it limits me to where I can camp and limits exploring while towing. Nothing I can't work around, but this last trip even though I eventually camped in a place I could have taken the trailer I did run into a few tight turn around spots that would have been extremely difficult with a trailer while looking for the best camp site. Second, I don't have a place to store a trailer. As it is, I have a 3 car garage and 5 vehicles. I suppose I could widen my driveway and cement the garage side of my house, but that's a lot of effort and expense just to have a place to park a trailer. Finally, the cost of the trailer itself. I'd like to think if I had a tent trailer I'd camp more than I already do but the reality is my work doesn't really allow for more than about 1 completely free, work phone off, weekend a month. If I could get out 3 or 4 times a month then sure, but when I'm only making 2-4 trips a year I just can't justify the expense.
If I had the money, space and time I'd love something like a 12' Jumping Jack trailer with a 4 person side-by-side on top. Heck, I'd even take a small toy hauler.