Fulks Custom Cranks has been at the Classic for several years. But, this year, he decided not to go, as the cost was very high. $2500 for a 10 X 10 booth and he needed at least twice that much space. Plus, it was another $2500 if you wanted to pick your own booth, vs having them assign you a booth...likely somewhere near BFE. Add in hotels and food and he said it would cost him $10,000 to be there.
See his March 21 post.
https://www.facebook.com/fulkscustoms
He's a BBC member, so maybe he'll add more info.