Also, depending on when you're going, that costume is going to be HOT! Really consider that, I remember going to an October
MNSSHP not even wearing a costume but a t-shirt and shorts (October 30th mind you), and sweating through my clothes, I can't imagine wearing a really big elaborate costume with robes or anything. This especially goes if you are going in August or September, October you stand the chance of possibly having slightly cooler weather, but take temps in to account when planning outfits. Also remember that anything long will be a pain in the booty when getting in and out of rides, and could get stepped on by other people or by ones self even if you find yourself going up stairs or a hill (splash, big thunder, space for example).