Oldbolter,
Last time I was there, two years ago, there were about 250 trucks. In contrast to the American Truck Historical Society (ATHS) national shows, which has mostly over the road diesel trucks, this show has many pickups and panels. When I took my '50 Chevy COE it was equal to the largest truck there. In addition to the friendly Stovebolt folks, you meet many local and regional people who are also extremely friendly.
On of the unique things I saw at that show was a young guy (?35 years old) who collects Chevy survivor trucks from the 80s. Now that is not my area of interest but his hobby was hunting down low mileage trucks from that era, not an easy task since he is from the area with lots of humidity and some salt in the winter. He had 5 pristine trucks, ranging in original mileage from 2200 to 30K. He does no restoration (he doesn't have to) and only does detailing. What was interesting was he got more attention from folks looking at original panel fitment, decal placement, orange peel of the paint, misaligned stencil painting of tailgate, etc, than all those modified, chromed and stoked trucks with stunning paint jobs of similar vintage. His joy was in the hunt for these rare vehicles in original (I really mean original) factory condition and I really appreciated seeing his trucks and talking to him. I have no idea if he was there last year or whether he will be there again.
I highly recommend this show,
Kent