This sounds like a tribe is just exerciseing thier tribal rights. This is why they sighned a treaty, so they could maintain thier culture and way of life. Wheather we like it or not the tribes gave up alot for the right to catch fish. I dont think the WDFW would let a net in the river if they had thier way. But yes it is a Fedral matter.
The WDFW has not won a court settlement for over 25 years against a state tribe and probably will not in the future. I think the WDFW does care a large majority spend thier weekends on the river like you and I.