I have a rooftop tent on an off road trailer, on a rack that opens up to 96 x 78 inches. We are family of six and in the fall and spring we use a diesel heater. I take my boys sometimes in the winter and it’s cold, and the diesel heater is great. Ive never had any luck with electric. Before kids, I always used a 2 man tent and the body heat and good bags were always enough. My buddy is an outfitter and when I go out with him, he uses a canvas tent that is quite big and he uses a wood stove. On these trips, we are in camp for longer periods and use it as a base camp. Personally, I like to move around a lot, that’s why we have the off road trail, rtt, and diesel heater. I barely have to use it though cause there are a lot of us in the tent, and I usually have a fire going in the morning before the rest crawl out of bed on those cold days.