Ray,
Says on the site that you can sign up on site Thursday 12:30 to 5:30 and Friday starting at 7:00 am.
Looks like a year long skusa license is $75 and a one time event license is $50. I’m not sure what the race entry, pit fees are. You are required to run Skusa MG Whites which are $212 a set. Test and tune on Friday is $50. When I entered I bought 2 sets of tires, friday test and tune, and race entry for both days. It looks like it was about $100 per race day to enter. I’m not sure what the at the track rates will be.
Stan might be able to answer those questions.
Richard