Re: San Juan Islands
We used to always look for a sandbar or rock ledge at the mouth of a small bay on the islands. Motor up to the "upstream" side depending on which way the tide is running and drift along the edge of the dropoff jigging a needlefish, buzz bomb, bottom fish jig, etc. You can catch salmon, halibut, Ling cod, or a whole bunch of other species. Don't forget to bring some crab traps!
You are going to have a great trip. We're heading up in August and I can't wait to get back into the islands up there.