Don't buy new walking shoes the day before you leave for your trip. If you don't own some already, buy them a month or two before the trip and break them in. I once made the mistake of buying new walking shoes in California just before spending a couple of days at Disneyland. I was a fool. In fact, don't plan on wearing any shoes in the parks that are less than amazingly comfortable.
Tired feet are a given at Disneyland.
Don't make the mistake of allowing blisters or real pain ruin an otherwise great trip. My recommendation for those who are packing lightly, is to wear a pair of Hush Puppies, Rockports or some other comfy pair of walking shoes that look nice. For women, they can wear a pair of open-toe Rockport sandals or City Sport Tevas. The key is to find shoes with the soft Corfram soles. Many nice walking shoes have the soft sole snow.