I really couldn't chip in as Alan was looking for a clam shack and I couldn't come up with anything remotely resembling that. Mussels are a bigger deal here, especially Penn Cove mussels. And then there is Taylor Shellfish Farm on Chuckanut Drive and their products can't be beat--although you have to cook them yourself. D'Anna's is a most excellent place so if they have clams, go for it; not too pricey either. There are several high-end seafood places but that is a different subject.
Edit: CJ's was mentioned; I ate there a couple of weeks ago and had the best fish (mahi) taco north of the San Diego.
2013 Escape 15A (April), "Egbert"
Ford 150 XLT 5.8L