WW2 weekend in Reading, PA
I've never camped for the show as its only 90 minutes from home. But, the show itself is great. It's one of my favorite annual events. There are huge crowds if the weather is clear but they do a good job handling it with the shuttle buses to the parking areas.
The only thing you want to avoid is leaving in the late afternoon. The lines for the shuttles back to the parking lots are long then. We wait until 7 or 8 in the evening to leave.
It would be great to camp on the grounds but there just isn't room. You will see rvs there but it is limited to those who are participants or reanactors.