You might want to tell that to the upper Skagit tribe. I have shared water with thier gill netters in March below Hamilton. I seriously doubt that there are many hatchery fish that low in the system in March and I am sure they know that also. Will they stop if the sport season is closed? Pfffffft! I have also watched them net around Fabers in April. I would think the likelyhood of catching hatchery steelhead in April is not high. They may justify it by saying this is where a large number of hatchery fish are released but, you make your own judgement. Let me say I have only seen this once a few years ago.