I was at this for awhile last year. I wasn't staying at the Boardwalk... I walked over from Epcot. It seems to be open to everybody. They had it on the lawn opposite the boat dock. There was a deejay and some CMs running the party who made everybody do the Hokey Pokey. Mickey was there dressed as a ghost with ears. Lots of folks were in costume, both adults and kids. I remember seeing someone dressed as Zurg, it was a great costume. Looked like fun. I didn't stay that long, just dropped by to check it out.