I've not been able to find any mooring, or requlations for mooring in the California delta. I know of one couple who leased an island from BLM, but those deals are virtually non existant today. I found one small plot of land, and I do mean small (9K sq ft), for $150K, but then I'd have all the red tape for building a dock. That is if the coastal commision approved it.
If anyone knows of any resource for CA, I'd appreciate the information.