I've never been at that time but do go every year to Key West just to vacation. From those that have gone and those I've talked to in KW it is a nudists, fest galore! I'm not a prude but you had better be ready for lots of nudity and other items of display. Some of the costumes are really great, body painting, etc. Book a room far in advance and you will only be able to book a min of 3 nites. Take lots of pics, please!!!
