I can add that the Cresent City Harbor can be good for all of the Scoters, Harlequin Duck, Long-tailed Duck, Black-legged Kittiwake, several gull species and Rock Sandpiper. The North Jetty in the Eureka area is also good of the above mentioned species along with Red-necked Grebe (this jetty can be very dangerous in rough seas though). I would also recommend Bodega Bay, north of SF for many species of shorebirds, gulls and ducks. Good luck!