no propane burners. propane freezes solid at minus 60°, and you need heaters to get any flow long before it gets that cold, to the point that you can set propane out in a bucket, which I have some experience with in useing it, to supper cool transmission shafts, so that they shrink, and press fit bearings slip right on. so yes they have propane, but they use it in other, less well known ways.
Well, locals called it propane, but I didn't exactly "send it to trace for analysis."
Generally, you (and your toolbox) only spent a few minutes out of every working hour outside. And your toolbox would definitely be room-temperature initially and not cool down to anywhere near ambient temperature while out.
No, that's when you use your propane burner burner to heat up your propane burner.
Propane freezes long before -60C.
The recent cold snap in the Yukon had smaller tanks useless just past -35c, and bigger ones not doing much past -40c.
We don’t take it on winter adventures for that reason.