Hi, a couple of us from the Central California area are planning to go to Castle Airport in Atwater, CA. There is a group forming in Fresno to caravan up to Atwater, here is the thread if you're interested:
http://www.s2ki.com/forums/index.php?showtopic=417688
For more info about the autocross:
http://www.sfrscca.org/solo2/Fresno/
Thanks,
Amer