And Crocs aren't terrific for everyone, though they are heaven for some of us!
Try the bodyglide, see if it works! Do that around town before your trip. If you want to bring them, do so, but maybe bring another pair of shoes with you that day just in case you need to change. Changing shoes each day, and sometimes during the day, is how I last at Disneyland, and I can imagine it being intensified at WDW!