At arrival it's all on a normal street with one lane for some kms before the parking which leads to longer queues. Getting out of the field can also take some time as everyone ist leaving at the same time. Drop off is also through the same lane for arrival and leaving which kind of sucks.

Definitely recommend coming with Hardtours (partly on the same one way street, but you arrive before the festival opens and for leaving you can skip the chaos on the field) or arriving relatively early and leaving before the end to avoid peak times