I bring a little camp stove sometimes, it heats up soup and chili really fast. This year my buddy is bringing a little crockpot to plug in somewhere.
Cooler of beer is always good.
Fully charged phone, if there is no reception, switch to airplane mode and your batteries won't drain. I use mine as an mp3 player. If it is really cold, put a handwarmer packet in the same pocket as your phone and it will help the battery not get killed.
#1 and #2 screwdriver
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