Actually, I'm pretty sure all your winter fish are Chambers stock, the summer fish are probably Skamania strain ... Smalma or someone who fishes those rivers a lot could confirm / deny that.

I think I failed to make my point in the previous post. Every strain / population has a unique, but there is a rough set percentage of fish that come back after different times. There is a wide variance of these percentages from system to sytem in the wild fish ... but the uniformity of the hatchery fish in all rivers using these stocks show similar percentages of 2's and 3's across the board ... thus you see the same size fish as a whole in the Sky, the Green, or the Bogey. Rivers such as as the Cow and Quinault use different strains and thus you usually see some bigger fish ... some of the other coastal rivers receive USF&W Sevice plants of these Quinault fish, and thus the bigger "brats" we often see there

You'll see some variation due to outside factors (for example may of the expected twos on the Bogey this year got a bad batch of feed and went out undersized), so you'll likely see some consequences of that on their survival / return rate.