Coastal Eating from San Francisco to Vancouver
This is still pretty close to your starting point, but depending on what time of day you leave, you might be peckish when you reach Marshall near Tomales Bay. Stop at Tony's for barbecued oysters and other great seafood dishes. Marshall pretty much consists of Tony's and some docked boats, and is on Hwy. 1 some time after Olema. Can't miss it.
OK, my suggestions are kind of campy, but they suit the roadtrip mood:
Eureka- Samoa Cookhouse
79 Cookhouse Lane
Eureka (actually Samoa)
Ca 95501. (707)442-1659
Family style dining with a changing menu. You choose between two entrees, and it comes with soup, salad and bread. Pie extra. Last of the loggers' cookhouses, complete with a museum. Cool atmosphere, decent chow, and a unique experience. Like a living museum where you get to eat.
Tillamook- Tillamook Cheese Factory Cafe.
4175 Highway 101 North
Tillamook, Oregon 97141
After touring the creamery, you can dine in the cafe which showcases Tillamook products. Not for the lactose intolerant.