One of the things I hate when camping is having to find ice every couple of days. A friend of mine turned me on to a cooler insulation insert called the KoolerCap. She told me that my ice would last...
If you camp where you have power I suggest that you look into a Coleman cooler that works on 12vdc and comes with a 120vac adaptor. Mine is a large 40qt cooler and will keep the inside 40 deg cooler than the outside temp. No ice is needed. I had mine for at least 10 years now and it still works like the day I bought it.