The Packing List

Several years ago, I was doing field research in a remote and extremely cold site, and I had to take a multi-day survival training course before they would let me out on the ice unsupervised.
On our first day of “Happy Camper School,” my classmates and I were given a list:
“Bring: Extreme Cold Weather gear, extra clothes of choice, sunglasses, full water bottle, camera, pee bottle, sense of humor. Leave behind: Cotton, alcohol, pets, worldly troubles, self-pity.”