CM -
I theory you suggestion sounds good but not sure that it holds up in the real world (at least for the recreational fishers).

Let's look at a real world example. For the Green river the 2021 hatchery Chinook forecast was 24,000 fish with a hatchery need of approximately 4,000 leaving 20,000 fish to split between the treaty and non-treaty fishers. For the hatchery coho the forecast was 75,000 with a hatchery need of 2,000 leaving 73,000 to split.

The tribe has demonstrated that given the opportunity they can catch their share; for the Chinook they would need to catch that 10,000 out 24,000. For a recreational fishery fishing behind that fishery it would be much more difficult.

The Green is a small river; typical August flow 311 cfs and September flow of 386 cfs. The hatchery is located about 34 miles from the river mouth with limited shore and boat access. The harsh reality is that when we see extreme shore fishing access quickly becomes limited. How would the recreational fisheries catch that share without taking the fish at the hatchery?

If we look at the exploitation rate (catch/(catch + escapement) needed in the recreational fishery on the Green to "get" their share they would need to catch 2/3 of the Chinook run and nearly 95% of the coho. A quick review of the 2019 information I found that for the Skagit hatchery spring Chinook the recreational exploitation rate was 13%. For the Skykomish hatchery summer Chinook it was 8.3% and for the Samish hatchery fall Chinook (the best I found) it was 37.7%. For coho the typically exploitation rates were 10% or less. It seems pretty clear to me that with traditional methods the recreational fishery just does not have the power to catch their share. Do we create a fishery without bag limits or method limitations at the hatchery rack? How would this fly with most anglers?

How does the table quality of a Green river Chinook caught in late July in MA 9 compare with one caught in late September at Soos Creek?

As always been the case if we wish equal catch sharing between treaty and non-treaty fishers the bulk of the non-treaty catch will have to taken by the commercial fisheries. The recreational have long lobby for the current recreational priority of PS non-treaty Chinook catch. Do they need to re-think that priority?

Somethings to consider.

Curt