Andy, You might want to run that by the new owners of the Expo show. They might comp you a table to do that. I do know that they need more full tables at the show. You still have the fuel and parking expense but your concept does have an appeal. I attend the Civil War encampments for the very reason that it is educational and also the suttlers. I know how the battles and the war ends but the information being presented by very knowlegable people you can't find anywhere else. Just a thought.
So if I'm hearing (reading) you right, they nail a vendor for table space, AND make them pay parking?? At some point there is that final straw. I can see where something as simple as that extra $3.00 added to the parking fee a couple of years ago could have been that final straw. That's nervy when they sometimes have the hot tub, or RV shows, and proclaim free parking.