Science minded people--help me engineer a simple structure to stay warm?

Does anyone have thoughts on the safety of a little buddy propane heater? Not sure if the claims that it is safe CO wise r true.

Also if using a space heater in a tent, would there b a way to insulate top of tent so the heat is retained

We may have found good spot w electric

 

i'm sorry i havent read all the posts, too ill so sorry if these have been mentioned or not appropriate, but as well as electric blankets, you can buy electric sleeping bags or sleeping bag liners too now.

Depending on your sensitivity etc. theres also fabric bell tents, with camp size pioneer wood burning stoves. I own a folding wood burning stove made for camping and its great, folds flat when not in use and weighs next to nothing. The chimney goes through the tent roof to make a hot tent if you have wood/fuel available. you can cook on top of it too.

 

Maybe you could get some ideas from this video on van living.

https://www.youtube.com/watch?v=rUepnqcbzPc