Hey Meagan,
The best climbers I know anywhere around you are located about a half hour north of the California-Oregon line in Grants Pass, Oregon. They have a company called New Tribe (newtribe.com) that makes all kinds of goodies for recreational climbers and researchers, and they also like to take people way, way up into the tops of some of those fantastic coastal redwoods and other trees. I know it's a long drive from central California, but the experience will be worth the trip.