This ticket is only valid in connection with the “festival ticket including camping access”.
Example: if you are three persons in your caravan, you need three “festival tickets including camping” plus one parking ticket for the caravan/camper/RV.
Note: RVs and caravan plus vehicle have their location separately from the tent area. According to German law tents and caravans/campers/RVs are not allowed to stand side by side. See also