I actually work at a lot of these type of events as a reader. I hope you enjoy your visit to this particular psychic fair and learn something new that will add a new layer to your skills as a magician.
Please
please don't go as a clever clever magician who thinks he knows it all and will secretly scoff at the psychics and their silly ways. Depending on your beliefs, the readers at this fair will either be a) hugely gifted cold readers or b) hugely gifted psychics. Either way, they will really know their stuff and will happily eat any young magicians for breakfast who may come around being all smart. I'm certain this isn't what you're planning, but I just thought I'd inject a small note of caution.
Anyway, have fun, have a reading, and most of all - let us know how you got on!
