I'm a new poster and fairly new to fly fishing. I was in the Smokies this past weekend. Fished a little on Saturday. The water looked like a stream of Yoo-Hoo. A few nibbles but no takers. Went to Elkmont on Sunday before leaving for home. The water was clearer but still no takers. It is interesting how fly fishermen attract an audience. People will stop by the side of the road just hoping that you catch one. My wife was sitting by the road reading and noticed how visible my fly line was against the water. It's green. Is there any evidence that the color of ones fly line affects success on the water?