With a little digging, I found this:
31st Coopersburg Collector Car Show Flea Market
Event Dates: August 19, 2007 - August 19, 2007
Location: Coopersburg, Pennsylvania
Hosted by the 1st PA Mustang Club - at Southern Lehigh Living Memorial Park, Rte 309, Coopersburg.
All makes, models & years of cars and trucks welcome.
Registration 8 am to noon, awards around 4 pm.
28 classes + President's & Chairman's choice awards & Best in Show.
Registration $10. if rc'd by August 13th, $15. August 14th-19th.
Flea Market, Car corral, DJ Bob Burke, Dyno testing, Food, Playground.
It's an hour and 36 minutes from you Paul.
I'll call the guy in charge and see if they have a registration form available to pre-register.