Lake trout are pretty boat shy and most lake trout water is crystal clear. Flashy spoons with lots of line out or a planer board to get the lures away from the boat.
North Shore of Lake Superior look for gravel and rocky bottom—10 to 15 ft deep —troll slow around 1 1/2 to 2 mph. Look for water temps on surface of 47 to 51 degrees. 2/5 oz Little Cleo’s blu and silver or brass and red.
I catch a lot of Specks casting but only a few lakers gotta troll for them.