Wooly Buggers are hard to beat also. Ditto on white and pink. Blue and white is killer too. One thing you might consider when crappie fishing is to change flies when you're in a school and the fish quit biting. I've fished them for years with both spinning gear and fly rods. It's weird but you can catch them on one color or fly or bait and they'll quit and you can tie on something different for them to look at and they'll start back up again. I've sat for hours anchored over a brush pile in deep water in winter fishing a jig straight down and done this over and over. It works the same with a fly but not quite as well.