Freeze water filled one gallon milk jugs, two in a quality 55 qt cooler last a long time.I agree that the fridge is expensive and a cooler would work...but damned if it wouldn't be nice not having to worry about melted ice getting into your food. And yeah, their are ice packs, but I've never been able to use a cooler for any length of time without having to replenish the ice and drain the excess water.
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