My friends, and I, were there in mid September. Fishing was utterly dismal for trout. Surface temp was almost 70 degrees. So the trout were hugging the bottom. We'd see big fish, on our finder, come up from the bottom (as if they saw our lures/bait). But then veer OFF quickly, and go back down. Where the water is cooler.
I saw, I believe, a successful report on the Washington County P & R facebook page. That fisherman did quite well. But I don't know where he was fishing. I can't seem to find that page/report now though.