Burning Man occurs at the Black Rock Desert in Northern Nevada around Labor Day. Here is their website: http://www.burningman.com/
I like this quote talking about advertising:
When advertising on-playa, please remember that Burning Man attendees are Homo-sapiens and not marsupials; a naked person has no pockets to stash flyers. Flyers are an unintentional cause of trash problems, but stickers or body stamps are a more practical option.
