You ever drag small, flatlined plugs?
Small kwikfish, wee warts and the like. Natural colors. Rainbow trout, crayfish, no bright orange or pinks.
Let em way back behind the boat. 50' at least. Slow. Cruise along the shoreline, find the shelves, and drag em right on the edges. Find one, flip a u-e, rinse and repeat.
Sammamish is purdy good too.
Slow. (vedy impotant)