The chinnook and I think some steelhead come from the wiskey creek hatchery... otherwise cedar creek, big creek, and the N. fork of the klaskenine hatcheries provide the fish. As for a peak I wouldn't say the wilson has a true peak, more like weather related mini peaks all season. I would personaly never neglect the tidewater on the wilson, its some of the most chrome brite productive stretches of water in oregon.