Next year you might want to consider taking Amtrak to Harrisburg. Get a hotel with shuttle service so you can avoid renting a car or I'm sure you could hitch a ride from someone staying in the hotel and going to the show.
Just a thought.
I'll be there on Friday looking for some parts. Top on my list is finding the rear interior lights (socket and lens) for a 69 convertible. Give me a yell if you have them and I'll stop by first thing.