The Best Bead Show really is the best bead show. I went last year as a buyer and the place was filled with first class glass artists and filled with buyers. I saw and bought some of the amazing beads at that show; I went to the True Blue something show the next day and on a whole it paled by comparison to the Best Bead show. What I may suggest is along with your finished jewelry, you have components to sell, I think a good number of the people shopping that show are looking for pieces/parts. Be sure to take more receipt books than you think you'll need, ditto on charge slips, catalogs, business cards, etc...
The day I went, I didn't get there until 2 hours before closing and the place was swarming with buyers, unfortunately it was raining and the people outside in the tents were wet, cold and largely passed by as people ran from their cars to the building. If you're going to be outside, be sure to take plenty of lights and portable heaters - without the rain, it gets cold after the sun goes down with rain, I'm sure it was miserable. Good luck on your show!