some more food for thought:

For those of you that know the south fork of the sky. know that the WDFD reports a large number of native fish being shipped over sunset falls each summer. I may be wrong but it seems to me that there were never native fish that passed over sunset falls. thus a large number of hatchery fish have taken to the uninhabited upper river quite well. And most importantly: Perhaps this does no harm since the river was uninhabited when they introduced the hatchery strain.