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Wine, cheese, sausage, bread, book, knife, water, sunscreen, metal plate, metal cup, lighter, chocolate
If you're going to spend the night in a bivuac bring a sweater and a sleeping bag for yourself, plus some old newspapers, matches and some non perishable food (canned tuna/canned meat/salt/pepper/spices/pasta/rice/tea) as a gift for the next guy.
Stay comfy.