I'm glad someone posted this. I'll be there in the afternoon if anyone wants to chat. We are running an 89 Civic Si in STX this year, but I have some good experience with a 2006 Civic Si in G-Stock (race tires on a mostly stock car).
If you have a stock car, you run in the morning (GS and HS is where the new Civics are classed) and should arrive at 8 AM (you are done by early afternoon). If you have a new Civic with any mods, then you'll probably run in the afternoon (STS, STX or SM) and should be there by 11 AM to prepare and walk the course.
The website for these events is
Philadelphia Region SCCA - Solo Events Page and you can find it toward the bottom. The only thing you need to bring is your license and cash. Helmets are provided if you don't have one. Your car only goes through a safety inspection (checking the throttle return spring, battery tie downs, etc). And if you don't want to drive, then at least come and see what it's all about. Directions are also available off that site!!
Hope to see you there!
Chris at RedShift