As a pre-order customer, my dealer got me a pass to the VIP day. I was allowed to drive but my times didn't count. Fair warning, all the Mazda6's are automatic to level the playing field. I did not like that, but since it didn't cost me anything I couldn't complain. If you are competing, and can try to strong arm your dealer, you will have a significant advantage over others. I turned in a 460ish score by my second lap. If I had 2 more a day or to later, I know I could have improved it. My advice to you is go through the different classes as much as you can (but at 7:00 am you are pretty much out of luck). When you go though the individual classes push the car beyond what you think are it's limits. You will be more surprised by how much you underestimate it.
Good Luck and Have fun.