Smalma-
I think Bob would be the better source then myself regarding what percentage of Sol Duc springers actually spawn in the wild and thus what percentage of the returning fish are wild.

But given the chewed up dorsal and ventral fin, I would say hatchery fish all the way!

...plus from what I've heard, a certain number of the Sol Duc springers are marked but not 100% (again, Bob would be the more accurate source for that information).

But given the fish are there purely for tribal and sport catch (Rogue River stock I believe), I do not forsee anything wrong with harvesting them. I would look at them like I look at the vast majority of lakes that are managed under put and take regulations. The fish are there strictly for the reason to be caught and killed...if the fish is killed then no problems. If the fish is released, great, someone else will get a chance to catch and probably kill it.

...but then again, this is whole 'nother can of worms!