I regularly fish a small lake with very big bluegills but they are almost never less than six or seven feet down and often much deeper. Across the way is another lake with nice crappies but they are usually about fifteen or twenty feet down. About the deepest I have had any success with flies is the six/seven foot range. After that the amount of slack in the line (I think) means that I don't detect any strikes. How deep do you fly fish and how do you fish deep?