FWIW, I use a standard size Coleman cooler (nothing fancy) and keep it in the shade as much as I can. I also buy and freeze 3 one gallon water jugs to put in it versus bagged ice. It melts much much slower, doesn't fill the cooler with water, and as it melts I have cold water to drink. I usually only have to add one bag of ice on the last day or so. I stay Saturday through Thursday.