Another thing you could try (depending on how late into the season you plan of fishing) when they are staging off the mouths and into marina channels is to slow troll (under 2 mph) big bright jointed raps and lymans. At this point, it's more about getting them agitated than making them want to feed. Also, I'd concentrate on more of a late evening/dusk bite once late august/september rolls around. There will be plenty of fish around Port Hope. early/mid August is usually a tough bite, and without fleaficker or wire line, the water fleas make it a huge hassle.
Definitely keep your drag as loose as you can get away with while trolling.