From the boat ramp, head out around the island to the right. It opens to a bay, lots of small mouth in the shallows of the bay. Continue around the shoreline trolling from the point back and forth along the rocks where the primitive camps are. Use a figure "S" trolling pattern. My go to was a 1 oz. weight, snubber, 4 ft leader to a Double Whammy (with gamkatsu red hooks), top hook with pink Power bait Maggots (have to be pink), the bottom hook with white shoe peg corn or a night crawler tail threaded up the shank. You can add a Kokanee flasher (the silvers will be attracted), if they are not biting well.
It may take a couple hours or most of the day, but I can't remember not limiting.
Trolling the far shore can also be productive. Most times trolling by the primitive camps were all that was needed.