The salmon fishing should be just starting to get good then. I spent my summers up in the sanjaun islands while I was growing up and learned how to mooch a ride on a boat when I was young and then by the time I was 12, 13 I was running my own boat. The west side of sanjaun is usaully pretty good, you will want to mooch a cut plug herring, use the sliding mooching wieghts and about 6 feet of leader. You will be fishing anywhere from 60 to about 140 feet of water. Look for good tide rips close to the points and of course keep an eye out for the birds.
Good luck!!
Superfly