I suspect that CM has hit the major variables but I will add that since the river has been closed due to the battle over the reservation boundary the State has opened/liberalized both rec and NT commercial fisheries in the lower Canal targeting those fish in trying to get its numbers.

The take away is that no matter what the returns it is unlikely that there will be a recreational fishery on the river until the boundary dispute is resolved.
Remember to immediately record your catch or you may become the catch!

It's the person who has done nothing who is sure nothing can be done. (Ewing)