tb - I've been there the last two years for the stocking. The furthest up any get tossed in is the 44 bridge just east of Oleona. Nobody even walks them up toward Long Run. The WCO's heavily coach the volunteers to get them in the water ASAP and not walk them far.
That being said, I've caught stockies upstream of Long Run in the Fall the last two years. Not many, one or two per year, and again the vast majority of the catch up there is wild Brookies. Kettle at about Oleona starts to get warm in the Summer, and I suspect the stockies (along with the wild fish) move upstream in search of colder water.
My Dad caught an 11", emaciated stocker Brookie all the way up at the big hole at the mouth of Germania Branch last year in September. Given the location, I suppose that fish could have been transplanted there by some of the cabin owners, but it's possible it ran up too. I kicked out a mid teen's range, presumably wild Brown from the head of the run coming into the same hole.