The small pop ups are really just a glorified tent.
That that's exactly why I just sailed past the idea years ago.
I camp on the Island 90% of the time and doing so in a "tent" is like rolling in cat litter after running a marathon in 100 degree heat..
My experiences primitive tent camping in arctic conditions also led me to conclude to never again primitive tent camp in arctic conditions.
But there are less extreme environments in between my two extremes.
In the end, as you say the smaller ones are glorified RTTs with wheels. I'd suggest looking at RTTs as another option.
I remember seeing an LMTV with a couple RTTs on top of the troop cover. It was pretty badass, actually. I don't think I save the pic, but I'll look.
*I spend more time looking for pics than I do working on the truck, LOL