Man, $100 seems like a cash grab! I paid it at Miller assuming the track was responsible but Sonoma never charges nor will we getting hookups or any other "perk", just the right to sleep there which I do at every event.
Now I am bringing an extra vehicle, a rented motorhome and that adds to the crowd but I plan on parking up the hill in my usual spot with the truck & trailer with the group down below.
I didn't factor the extra cost into the price of the motorhome and didn't notice the camping fee at registration and if they keep adding seemingly arbitrary fees this will be my last nationals.