There will doubtless be a good article or two on Sockeye fishing in te Seattle newspapers. They'll be in the Thursday papers the next few weeks. You might even get on the net and look up the time and PI sites and go to their archives on the couple of Thursdays before the last season.
Having said that, and with the understanding that I am not the formost expert on sockeye fishing, here is what works for me (and it sems for most of the boats out there).
TROLL SPEED = SLOW. Even slower than slow. Near dead slow. Then slow down a little more.
DEPTH = shallower in the early AM, then go down deeper as the sun comes up. I caught fish as high as 20 feet in the early AM last time. By the time the sun is really up, drop down a long ways. you'll hear guys recommend anywhere for 70 to over 100 feet. I fished 50, 60, 70, 80, 90 and kept picking them up, but never had a "magic" depth. I'm sure others had a depth that worked best for them.
SET-UP= Go to any G.I. Joes or fishing store and you'l see lots of flashers and red hooks for sale just before sockeye season. Ask the clerk and they'll tell you how to tie up. When they give you a short leader length, believe them. And when they tell you to use a really heavy leader, believe them (the heavy leader affects the hooks swimming notion).
Good luck, and bring lots of patience.
Last sockeye season I witnessed a really scary boat wreck where a guy in a 19-20 foot power boat plowed right into about a 14 foot boat at very high speed. He could have killed the guy he hit, and I was about 20 yards away, rowing my boat with my daughter in the back of the boat. We would have been helless if he had hit us in out little row boat. High speed has no place among that many boats....
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Thanks,
Fisherdan