I took a week long winter survival school when I was in Civil Air Patrol. the number 1 reason guys got evac’ed and failed the course was hypothermia which staryed with cold, wet feet. So, with that in mind a couple pairs of dry, warm socks would be something to pack. If you don’t need them they could always be used to keep your hands warm.
CC
“Which started”
PS army surplus “mummy” sleeping bag.
CC
Exactly