I was speaking with someone who works in costuming/entertainment at WDW. He was mentioning to me one of the rather odd characters in the Halloween Parade. The character or "the caretaker": a guy walking a dog on a leash and carrying a latern to mimick the same character from the Haunted Mansion attraction. He also mentioned that the characters in the Haunted Mansion section of the parade simply wear the actual spare clothes that are used for the animatronic figures in the attraction. I was looking at the pictures on laughingplace and what did I see. a picture of the parade with the caretaker and the white costumes worn by the ballroom dancers.
I was also told the tale of costuming not being able to find the right wig for a performer, so he went into the haunted mansion and "borrowed" one from one of the animatronics. When the parade had finished it's run after several months, he returned the wig to the attraction. Apparently facilities never noticed and never said anything.
Just some interesting stories.