Not sure of the time of year you're going, but use the snack credits for bottles of water. We have always been in the store redeeming credits 30 minutes before we leave for home. I decided for this trip, we'll redeem for bottled water in the parks when we're super hot and thirsty, instead of "saving" them for food. Best use? Well, I don't really know, but then if we're not using them, then definately! Since we're the ones that forget to eat if ressies aren't involved while in the parks , then I'm hoping water will be OUR best use.