I don't camp when I hunt caus I hunt near home, but when I go fishing sometimes I just sleep in the back of my SUV with the seats folded down flat. If you go looking for a beater truck, you may consider an SUV. My wife and I can both comfortably sleep in the Mountaineer, and use a fan in warm weather, or an electric blanket or heater if it's cold. Just plug into your campsite electric or small generator outside.
They hold a ton of gear and you can load a ton more on the roof. And the cold metal bed is already covered in sound dampening insulation and carpet, so it's warm enough to sleep on already. Also I spent about $25. on a roll of nylon screen and magnets and made screens that fit over my windows for summer camping. It's so comfortable for me that I just use the tent for gear storage most of the time. Deer can be quartered and packed on the roof or carried on a hitch haul rack. Or in a cooler or tote in the back.