I remember that hatch when I was a kid. My mentor tied his flies with a porcupine quill body.
When I was 15 or 16, a decent hatch came off on 1st day when we were fishing Bald Eagle Creek where it runs through the town of Port Matilda, just West of State College. That afternoon was the best first day I had as a kid. I was tickled to be catching trout on dry flies.
That day the fish were really keying on the dries and it seemed like I was catching one after another, releasing them, and getting ribbed by the people who were trying to fill their stringers.
Still makes me smile,
Shock