While fishing various Tennessee tailwaters, I use a lot of sub-surface midge patterns but have never tried midge emergers and dries much. The few times I've tied one on, the fish ignore it. What patterns have ya'll found useful when the fish are rising to those tiny bugs you can't see? Emergers, dries, whatever works. Perhaps more importantly, how small do you usually have to go before the fish start getting interested? Any recommendations are appreciated!!!

David