Try my column titled "Rivers and Mountains" here on FAOL. There is good public access to the RG just N of SF and E of SF there is some more. Within 50-60 miles of SF there are TONS of options. And it is a MYTH that you have to pay to play in that area...perpetuated by the guides, fly shops, and lodge operators in the area who have such pay-to-play access. There is a LOT of public access up there.