hmmm....since washougal was mentioned maybe i can clear some stuff up...
the coho raised there for the klickitat come from fish spawned at klickitat hatchery...klickitat doesn't have enough water to keep them so they go to washougal until it's time to imprint them...which they do in ponds in the lower river to limit interaction with upstream guys....so i don't think the unclipped fish are really outplanted fish ...
i think it's really hard to talk in general terms and maybe ya gotta treat each situation differently...