There was an actual published sourcebook called California Free State, which you'd probably only find second-hand these days. This book kicked off the state of affairs as of the 2050s, with follow-up writeups in Year of the Comet, Shadows of North America, and Threats 2. Apart from a [very] brief mention in System Failure the next time CFS pops up is in Sixth World Almanac.
Apologies if this counts as information overload.