WWFF,
When I fish here in the Susquahanna All I use are hellgrammite paterns and normal nymphs tied a little bigger like on a 8 or 6. My biggest so far is 25lb last april caught on a hellgramite. I just found another pattern I'm going to try this year. I think it is called a thisle fly?
Hoo: dry fly 6 - 10
Thread: brown 6/0
Wing: white Marabou
That's it, it's sapose to immitate that white fluff blowing off the trees in the spring and early summer, wich the carp here love to suck up around the shore lines. Good luck, Dave