We have a Coleman extreme cooler which we take to Rainy lake for 4 to 5 day trips. In past years we have had very warm trips with highs being 85 – 87 all everyday, the Coleman extreme did just as good as our friends Yeti’s and Bison coolers. I believe limiting the amount of times you open and close a cooler and having good ice really helps for long trips. I take empty country crock butter containers and freeze water in them to make my own block ice, ice from a convenience store never seems to last as long as ice from home.