That looks very comfy, but I think I'd prefer electric heating (and I have no juice in the garage since some low-life helped themselves to the mains wires) as I'd be worried about CO or CO2 accumulation in an enclosed space...
Heating of some kind would be great.
Tea in a thermos flask for now, then!!
You cannot wake someone who is pretending to sleep. Stop pretending. Wake up.
Doubt: ...it's the only thing I'm sure of...
-Marsupials: Nature's idea of Concealed-Carry-