Being 'party intolerant' I would opt for non-attendance and go and have a good time somewheres else.
If you 'have to' then go as Che Guevara during his wanderings - 'The Motorcycle Diaries' It's easy, camo & leather.
And remember, longer than 10 or 15 minutes in, if anyone is the tiniest bit interested in your costume then they really don't understand parties . . .