If I don't see plenty of fish on, I keep moving. Traditional hot spots include Lacy Island, the Lighthouse, No Name Point, McPherson Point, and Coho Point. Both chinook and coho tend to feed in the top 20 feet of the water column when near Langara. Cut plug herring is the universal bait of choice. Trolling speed is usually dead slow.
Many guides kick the motor out of gear every thirty seconds to let the bait flutter down deep.
Strikes often come when the boat begins moving forward again. Don't be afraid to experiment with what works best in your part of the world. I have had excellent success at Langara fishing Zzinger jigs in the 2 and 4 ounce sizes. A few year back no one was catching fish until a Lure Jensen tackle representative tried using Diamond King spoons fished deep. He limited in nothing flat as did everyone else who could get their hands on the spoons.