I recently took a trip to Tomales Bay which is a short drive to the North of San Francisco near wine country to learn all about the oysters they harvest as well as how to make smoked oysters. If you're in town, I highly recommend spending a day driving out there to enjoy the oysters, the spectacular views of the bay. There are lots of little towns on the way, that have great options for food too!
Smoked oysters are a delicious way to cook and eat oysters and you can use them in a variety of ways beyond crostini, they make a great addition pasta as well as salads. You can get the technique and see what I learned behind the scenes at Taste.