Campervan passes are available as an add on here.
You need one campervan pass for your vehicle. Each festival goer (including the driver) must also have a Weekend Camping Ticket in order to gain entry. Please find more details in the 'Campervan and Caravan Passes' section here.
If you have purchased a Campervan pass, the physical campervan pass will be posted to the address on your Ticketmaster account a few weeks before the festival.