Do I need an Access Pass for Camper-Park?

Yes.
The Access Passes are included in the price of the plot and available to your booking at Wacken Ticketcenter
There are no additional costs when booking - only valid for the purchase of the W:O:A Campground Access Pass!
When booking, you must select a binding arrival date, but not a route or vehicle category.
You will receive the route description a few days before arrival.