If high water is forcing lots floating derbies down river, it can make fishing tough. Other than that, I don't think dirty water effects the sturgeon bite nearly as much as the temperature of the water.
Port Susan is the general area between Camano Island and the mainland. Snohomish, Stillaguamish, etc. dump into the area. The water tends to be shallow at low tide in that area, so one needs to be VERY careful when sturgeon fishing there, but right now is the time when some of thos large ones start to come in. I catch very few shakers there, a fair amount of keeper-size fish, and A LOT of oversize fish in the 100 to 200# class!! Sand shrimp works well, but the crabs will eat you alive- about a 40 to 1 ratio crab to sturgeon!! Lots of fun and, because of the shallow water, the fish usually go aerial!!