Ok, so myself and two other friends are going to WDW in about 11 days. We are doing MNSSHP. We are ages 24, 25 and 21. My question is...should we dress up? Would it be strange with our ages and the fact that it's only going to be mid-september? And should we Trick-r-Treat? I think it would be fun and I am paying for the ticket. What do you all think?