Just wanted to let you know Walmart still has a few of the
Mr. Heater propane heaters on clearance for $75 compared to $125 at bass pro. I have that heater and it kicks some major butt and is very safe. Does not produce noxious fumes and has tip over safety switch. I sleep with the bivie door open and the heater on low and it will last all night on one propane cylinder and keeps me warm. I have also used it under the brolly and it does a good job of keeping you warm if you keep the wind behind you.
And yes I know Emma has electricity for a electric heater.