My DS will be almost 3 on our Sept trip. He is potty trained during the day and he wears a pull up at night. My question is, do the pools at WDW resorts (we'll be at BWV) require a certain age of a child to wear swim diapers regardless of whether or not he is potty trained? I remember from some other threads that HIFS required children under 3 or 4 (?) to wear swim diapers regardless of whether or not they are trained. Just want to be prepared! Thanks, Jo