As Rivrguy said, the weak stocks limit the mixed stock fishery. If the total allowable take of all the weak stocks is, say, 200 fish then the mixed stock fishery os over when those 200 are dead. Regardless of what is left.

That is the conundrum of weak stock management and then throwing in hatchery fish. IF the hatchery fish returned to a bay/river where the wild fish were ignored, you could fish them there. Minter, Coulter, the Deschutes should not have any issues with wild fish in the bays/creeks. The hatchery production should be confined, if we really want to have wild fish, to those locations where you can catch everything that is there.

If we want wild stocks, then mixed stock fishing needs to die, at least in the foreseeable future.