The lakers start staging in the Lower Niagara in Fall and can be caught along with the salmon in the river proper. On the US side, lakers can be caught at Artpark, Devil's Hole, NYS Power plant fishing platform and Whirlpool. You can also drift or troll the bar at the same type of year. If you have a smaller boat, go out on a calmer day. Trolling stickbaits or drifting with tubes or live bait will work.
Tom