We bring goldfish, pretzels, fruit snacks, granola bars, peanut butter crackers, cheezits and dum dum suckers. Personally, I don't want to have to deal with carrying anything perishable because of the added weight of icepacks. But I know some people will bring in a cooler. I am the one that ends up with the back pack most of the time and we already have extra changes of clothes for our two littles, autograph books, sunscreen, battery operated fans, etc in there. We eat either QS or TS lunch/dinners and have breakfast in the room so last time I found myself often overpacking snacks the first few days. By the last few days of our trip, I only packed a morning snack for everyone and didn't have tons of options. If they were hungry, they ate what we had. And we always got free water from QS versus bringing water bottles in for everyone. Then we would either go back to our room for the afternoon or the few times we were still in the park, we would get mickey ice-cream bars or something like that as a treat.