I'm sure some steelhead are taken in the tribal gillnets during the chum fishery, but I doubt there are many.
Based on my experience fishing the Nisqually up until they closed steelhead fishing in 93, it was a much better late winter stream.
We caught a few early steelhead, but March and April provided the best fishing in my opinion.

I'm with Larry though. The state should open it up if the tribes insist on fishing.
The Nisqually will evenually end up being a private playground for the tribe just like the Skok if the state lets it happen, which appears to be the case.

SF