Alan,
Last year this time, I would have been no help to you. Actually until after Sept 6th last year, I had no idea if what I was planning would work. Hindsight is 20/20.
Greg,
Check out
www.gasolinealleycarshows.com Jeff has a calendar on there which will help in finding local car shows to scope out and also to pass out flyers at. Plus if you email him with your event info, he'll post it on the calendar for you.