I caught a sockeye last year in Lake Washington from my 19 foot Grumman. Here's what I did:
I use a trolling motor mounted near the rear seat (mine's a double-ender). I put the battery all the way in the nose and KNEEL on the floor just aft of the middle thwart. This is very important for stability. Don't even think about sitting on a seat.
My cooler was just forward of the thwart with one bag of ice in it which also helped stability. You must have a decent net handy too.
I put in at the little park on the Cedar River right where it enters the lake. Use this or the Atlantic City launch on the SW end of the lake. Either one will put you close to the very good water on the SW side of Mercer Island.
I have a Penn reel filled with 100 feet of 17 lb. test lead-core line. I jiggered the reel seat so I can mount it on a medium-heavy baitcasting rod. The short handle of the baitcasting rods make them easy to use in a canoe. I used 3 oz. of lead with a small flasher and a bare Gamakatsu. I counted off eight colors and put my motor on medium (slow was too slow). I got my first hookup in 20 minutes. I cranked the fish up with so little effort that I thought I'd lost it. 15 feet from the boat it came alive, tangled the leader around the flasher and broke it off. A half-hour later I got another hookup. This time I was ready for the run. I wore him out pretty good before I attempted to boat him which is important 'cause of course you can't lean out very far to net him. You'll see me out there again if they open the season this year. Good luck!