I've done just fine in high, dirt water for Steelhead but I'd stay home if it was for Salmon. Coho just don't seem to care about trying to find a lure or bait in dirty water, at least for me. Steelhead on the other hand are a whole different game. I've gotten Steelhead in zero vis on many occasions. The hardest part is staying positive when your fishing in mud, just isn't much like fishing emerald green, fishy water. I always go big red corky, lots of yarn, lots of eggs, good chuck of lead and fished close to the bank or on the seam. This set up has gotten me fish when the river has been pure cardboard.