The are a couple new meetup groups in California for you to join or visit when in the area:
Colusa Geocaching http://www.ColusaGeocaching.com
Northern CA Geocaching http://www.NorthernCaGeocaching.com
Southern CA Geocaching http://www.SouthernCaGeocaching.com
Our group is the newest to be created in Reno, NV. We meet Monthly and plan caches 2 to 4 times per month. Everyone is welcome to join us on our meetup site. www.RenoGeocaching.com