Very familiar with where you are, I believe the Cohocton joins the Chemung down there doesn't it? I live in Wyoming Co. but fish all over Allegany, Cattaraugus, Wyoming, Livingston, and a bit in Steuben, whenever we hit the Cohocton. Additionally I go to a Fish In in Pa every year, until this year, work has interfered. I have not seen any MB's yet but the Hennie's came and went early this year.