Now for adults. I will tell you that DH and I did go back to the resort and shower and change. To me it felt better to be a little dressier & clean. But I noted that most people just wore normal park attire and were not out of place at all. When we went there, it was very cold so most people had on long pants and jackets.
But if it were warm, I think I would have worn capris and a nice tee shirt (in other words as the person before me said - regular park attire).
Have a great time. And don't forget to look for the mice up high in the waiting room. One is named Gus and I forget the other's name!
You know I get so mad when I can't remember names whether they are WDW related or someone who is in my "real" (non-WDW) life! At least for today I remember the girl mice are Pearla and Suzi though I have probably spelled the names wrong!