The diagonal run was just somehting i knew and was thinking to fix it but in the end because of hurry it stayed in. Ya the warming up should be indicated better and have bigger area where it warms you. Now you need to be very close to the fire.
There is behind calculations that even if you cannot fire the camp it slows down the cooling. :) but there is not really use for that. Also cold gets you faster if its snowing and moving is better than staying standstill.