As long as you’re planning on harvesting fish, and in an area legal to do so, have at it. No problem at all with that. That said, the Trout (even stockies) are way better at finding thermal refuges and surviving than we give them credit for.
I’m sure it’s similar in all of the large freestoners across NCPA, but on Pine in particular I’ve walked down to Pine to start fishing a small trib at its mouth, and numerous times have seen dozens if not hundreds of Trout, mostly Browns but some Rainbows too, stacked at the trib mouth. Once in August, in very low flows, I was fishing a small steep waterfall trib to Pine. Water temp in the trib was 60F. Water in Pine proper was 80Fish (based on Bass fishing I had done the day previous). I took the temp right at the mouth/seep where the fish were stacked and got temps varying from 68-72F depending on exactly where and the level of mixing that was occurring. It’s worth noting that the bigger fish were at the head closest to the seep, presumably in the coldest water.
Point is, they know what they’re doing, and if you’re fishing Pine anywhere below Galeton after about mid-June for Bass, unless you’re deliberately targeting Trout in those refuge locations, you’re not going to catch any Trout, so nothing to really worry about IMO.