Here is a pattern that I created for our GL fishery that works great for staging fish, and although I have not tried it for skamania, I bet it you be a treat for them as well.
Dan's Green Butt SS(Sparkle Skunk)
Tiemco spey hook #6 - 1/0
Black uni 8/0
Caddis green ultra chenille
Black sparkle dubbing
Black Kyrstal Flash
Let me know if you tie it and try it out, would love to hear how you did on it.