I've set up a few at various locations around the world with the military and can say the tents without framing were a floppy mess that loosened up as time went on. Rain and snow raised holy havoc with the tent as well due to the increased weight stretching the tie downs and canvas. I am not a fan of ridge pole tents as the structural integrity of those I used seemed to be based off the tension of the lines holding the tent up, which kept the poles of the frame together. Lost an attachment point to a ridge pole during a wind one time and the outer wall fell inward........it sucked. Course it HAD to be at night too. If it were me, I would seriously consider framing the walls. It will lessen your reliance on the tie down ropes to keep the tent off your head and the heater, which could cause the tent to flame up. Not a situation I'd like to be in while in the mountains. Hope this helps.