Hey, I wanna start autocrossing my Miata. I don't have any autocross experience but I do have quite a few miles (400+) of the Tail of the Dragon under my belt.    
The way it looks right now, I should be able to make it to the July 9th @ OSU. My Miata is basically stock: cone filter, Falken ZE-512s.    
Is there anything special that I need to bring, or have with me? What's the dress requirement, helmet etc?   
Thanks, Jacob