MM -
If you make it a bit further North, don't miss
St. Orres , just North of Gualala it's probably the best restaurant along the Mendonoma coast.
Even further North, if you happen to be heading up toward Mendocino, check out
The Ledford House , sitting right on a bluff at Albion, outstanding views (get a table at sunset!), and terrific food.
In Jenner there is River's End, which I have heard very good things about, but I have not personally dined there. Always seems to be packed.
If you head over to Occidental, give the
Union Hotel a shot for family style Italian dining, great food, fun, friendly, casual place (Chicken Cacciatore is excellent).