[Kevin in NJ]

If you come Tuesday/Wed early you get campground parking across the street. It is relatively pricey compared to the cost of staying on the field.

Now if you are an AACA member you can get spots on the field.
You must be selling or advertising something. If you plan on selling something then you must have a PA sale tax certificate. If you are there to advertise your services and will not be selling anything you do not need the sales tax, just put down that you are advertising your services.

It helps if your motorhome fits in the space(s).

Ice is available just over the bridge.

I strongly recommend that you arrive Tuesday not too late. The best things are found early. Be prepared to walk a lot.