Go without a costume, and convince high people to give you bits of theirs. A mask here, some wings there. Prolly be pretty messed up by the end of the night.
i don't have my costume either. i was supposed to go to the island, where my costume is, but that idea fell through. so now i'll also be drunk and or/fucked up gusto.
Jake you should be a radio active ghost, wear a whole bunch of glow sticks and then throw some white sheet over you. i was that last year and it was fun ........... just a thought