From what I understand The Puyallup, Nisqually, and Muckelshoot all have a fisheries program. They have hatcheries, biologists, test fisheries, etc. Just those three tribes alone cover the entire south sounds largest salmon runs. They get alot of money from federal grants but I am sure some also comes from the tribes annual budgets too. And with all the casinos profits, those budgets are bigger. So maybe they already do give one days profit to the fish. I still think all nets need to be banned. My idea was give all tribal members free fishing licenses for food use. Allow them to catch the fish in a traditional manner, spear, cedar bark nets, fish trap, dip nets etc, for their special occasions. That way they keep the heritage alive. The free licenses would be used just like the rest of us. The same would go for hunting. To make up the money from selling fish, allow unrestricted gambling. Think about it, 25 cents a pull or 25 cents a pound? Lastly every treaty I have read signed by the Feds and the Tribes states that the tribes cannot have alcohol on their rez and that they can only trade with the US, no other countries. They can be viewed at this link.
http://www.nwifc.org/tribes/