Stunner, if you go to
http://www.modelaircraft.org and click on the Club Locator, just Select California as the state, no zip. It will return with most if not all AMA Chartered clubs in CA.
You might try email over phone?. Also check out
www.clubfield.com and
http://www.rc-airplane-world.com/rc-...clubs.html#usa
Good luck...
Edit.. added additonal links