in all the years i fished that river, i don't ever recall the september silvers being big, mostly jacks with the larger runs running 4 or 5lbs.
back before the state really screwed up the seasons, and it was a 1 fish limit until october, i used to love fishing down there because the hordes of people fishing for kings had gone home and wouldn't put the effort in for one silver. i could walk miles of river and toss a split shot with a little cluster of eggs and hook a fish every couple casts some days. my guess with a 4 fish limit starting in september it's gonna be crowded at best, and with that kind of pressure on the fish they'll probably be lockjawed pretty bad.