We have done a lot of camping and usually go for a week at a time. It was getting costly buying bags of ice all the time for the cooler. Then my husband came up with some solutions. First, we froze water in milk jugs for the beginning of the trip. They would last several days before having to buy ice. He also lined the top of the packed cooler with newspaper for insulation. When traveling in the car to the campground, he would cover the cooler with a heavy towel to protect it from the sun giving even more insulation.
By using these methods, we found we could go longer without having to buy bags of ice. We froze as much food as possible before leaving. We also planned our meals so the food on the top was the first meals for the week.
Source: My husband
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