Gary is right. Be there at noon. Lots of the "good stuff" is sold on Friday afternoon, but DO check again first thing on Saturday, as some crafty dealers will actually hold some of the good stuff for the Saturday morning early birds. (Imagine!) If you know a dealer (or offer to carry in a dealer's box), or just look like one, you can get in about 11AM. However, a lot of them are still setting up and really are not ready to do business.
It is also a good idea to set your figures up on Friday as soon as you can. The "prime real estate" goes quickly.
Looking forward to seeing you there!