First off, welcome to TFL. Second, you live in the middle of some of the best pig hunting in North America. Get maps showing public lands in your area, then get out and scout them. I know Tehama county has some great pig hunting on public land, as do Mendocino and Marin. Get out and talk to ranchers and farmers, many of them would love to just get rid of the pigs and are willing to let the right person take them off their land. Also talk to the game biologists at DFG about where to find pigs on public land. Good luck!