There are a lot of conferences coming up in CA this fall. I will be attending this one in La Jolla (San Diego area) at the UC San Diego campus.
http://www.cpackonline.com
I have been to the previous two conferences and they are well worth it.
Also, there is this one 'An Evening with David Icke' in Los Angeles on Oct. 1.
http://sacredmysterieslive.com
And this one: 2012 Conference 'Shift by the Bay' in San Francisco on Oct. 31 - Nov. 2, 2008.
http://2012conference.eventbrite.com
And, finally, this one: Bay Area UFO Expo, in Santa Clara, on Sept 27-28, 2008.
Hope that helps.
http://www.thebayareaexpo.com