I take my kids down there to Papermill Rd falls for sunnies and blue gills. Huge carp in there too. I have heard of pike below the bridge on rt39 above that also in the deeper holes but surrounded by private property tough to access.
Not sure how it fishes where it dumps into the genny . There is a park spot on Rt5/20 you could canoe south to the spillway off the creek. I see gigantic snapping turtles on the creek too.