I doubt the Tribes are making much off of steelhead. They just get in the way of salmon fisheries, here and in BC.

Probably the only place where we could have a decent steelhead fishery any more is on a stream with no Spring Chinook, a rather late Fall Chinook, and stock summers that can be 100% removed from natural spawning. Say, the Deschutes if it doesn't get too warm in summer.