In a pinch, if you are short on ice for your cooler, a gallon ziplock bag packed with (not yellow) snow can get you through. We were able to keep our food cold for a six-hour road trip using this method, even with just a basic cooler.
Part of managing safety during adventures, both tame and extreme, is to be very vigilant of the current conditions as well as any changes in those conditions. Here is a list of important things you want to be constantly aware of: *Current weather and pending weather? *Time of day and how much remaining light is…
Build a fire-raft when starting a fire in deep snow to avoid the cold snow from pulling the heat out of your kindling. Better yet, lay aluminum foil on top of that raft to reflect the heat up towards your tinder to keep the frozen logs from stealing the heat out of your flame.
The Gear Guys 