Man those otters are something! I used to stand on a table-sized flat rock to swing a fly right up at Headworks on the Green and one year an otter family raised a brood in that pool. The rock was completely littered with crayfish parts and fish bones, I mean covered! There was a trail of shells behind the rock too. As I recall I only got two or three steelhead that year at the headworks and those were hanging in the rapids several pools upstream.
Squawfish really do a number on the smolt. Sean tells me that the bounty has gone up to $8! The long pool downstream from the mouth of the Toutle on the Cowlitz is loaded with large squawfish and they love flies. They sure aren't steelhead but hey it might fill your tank and buy you a hearty dinner, maybe even a hotel room.