Can they really do this???? Sportfishing in blatant violation of published regulations off the reservation! I would be willing to bet it would be a legal violation, only problem is finding an officer to write the ticket and a County Prosecutor willing to press charges.
I live in Yakima, and when the native am's shot the elk in the feeding station (twice) they were arrested and prosecuted (although nothing much ever came of it after all the legal wrangling).