Mike,
First, I've never fished the Skaj for reds. But the Kenai sounds like a similar situation during red season with high flows and concrete colored water the norm. Actually these conditions actually made it easier to catch fish in the big waters of the Kenai. The high flows forced them to travel along the edges and the milky color of the water allowed you fish them only 3'-5' from the waters edge in about 2-3' of water without spooking them as pods cruised on by. The Skagit and the Kenai aren't that much different in a lot of ways. I'd head for a spot in that dirty water where the current runs in close by the rocks and short-line (no casting) just inside the current break with a bright red marabou fly off a 14-18" leader on a standard drift rig set up. Sooner or later you're bound to connect if they're there. Good luck