Just one comment to add to everyone else's advice. Even if you don't have reservations for restaurants, you can still eat a good variety of food at the quick service locations. You don't have to eat hamburgers and hot dogs for your entire trip. Not sure where else you could check this out, but my family used the My Disney Experience app when we were in the parks last year to look up menus of quick service restaurants when we started getting hungry, and then decide on a place from there, instead of just grabbing whatever greasy, fatty food was close by.