I'll be there as well. Probably get there in the 10:30-11:00 AM range, in time to see the cars up close in the BMW tent (CCA perk).
Not sure how maniacal you are about your car, but I won't be parking in the corral again this year, rather just outside it. When the cars shift coming out of 14 (they go through about 3 gears heading up the hill) they kick up a cloud of fine, sand-like dust that settles over the cars parked in the corral. I had my top down last year and about half way through the race realized every surface (seats/dash/floor/inside/outside/everywhere) was covered in it. Was my first time, and also saw some other BMWs parked outside the corral, didn't understand why when I got there - knew why when I left, ha.