You could just make a campfire if you wanted some cooked food. Let a fire burn in a garbage can for a while to kill off the germs and that's useful too, if you don't have anything to keep it in, then you can do just about anything that'll stay on a skewer. Also, you should line your sleeping bag with newspaper if the power goes out. It'll insulate it.

Smaller bottles or cans for the water, too. The gallons are fine, but if you run short or it goes on longer than expected, smaller containers you can put next to a fire and melt the snow in them. You won't run out of water that way, and you can keep yourself warm.

[ LOOK THIS IS THE MOST HELPFUL SHE'S EVER TRIED TO BE. She's also wearing Cassian's parka and it is huge on her so she probably looks ridiculous but damn stuff from a guy who grew up on a snow planet is warm.

She decidedly doesn't answer whether she's coming or not, though. But at least she's playing nice??? ]