You pay at the office. The park is split in half by the highway, one side goes to the lake and the other side goes slightly uphill and leads to the office.
You can also pay online through Travelok.com or https://guestrez.megasyshms.com/K5ZHC
People usually unhook from their camper at the site then they drive up the hill to the fee site it's not much just depends on how many nights your staying and wheather you need a spot that has electric or not and if you have a discount card.
Online or at the office
Thanks! Your answer is awaiting moderation.