I'll throw out one more thing I didn't see mentioned, that's making your own ice. The ice blocks you buy at the grocery store are pure garbage. They aerate the ice during the freezing process, faster for them, melts quicker, you buy more ice. Freezing your own solid blocks makes a huge difference. For my particular cooler the 2.5 gal cubes with the spigot you can buy at the store fit perfectly, I always have one or two in my stand alone freezer. Tupperware, ammo can, you can use whatever you can think of to make blocks. If I'm gearing up for a long rafting trip I'll start bagging cubes for awhile beforehand. Cubes get used to go in between all the little layers and gaps. The other advantage is using ice blocks in a container is you run a dryer cooler so things don't get waterlogged, and you can use it for drinking water later if it does melt. Or you can just cut the container open and chip off chunks for drinks the last couple nights if it didn't melt. Lots of good tricks, really for one week keeping ice should be a chip shot with a decent cooler and some good management.