Would be pretty easy to take 30-50k off the top of the rec quota each year, which is far less than any of the individual estimation errors let alone the extrapolated error, to ensure Sep through April fishing is secured (based on the very consistent data for those periods). That would allow various possession/monthly/annual quotas and/or the max size limit scenarios to be explored to determine what specific regs are required based on each year's quota. Such a small harvest Oct through April, regardless of amount of effort, there is no way the "full season" crowd can't be taken care of with little to no influence on required regs.
Again, the data is pretty clear. With quotas in the 900k to 1.1M range, the amount of quota required to secure the fishery outside of the core months is insignificant. In fact, the underage from the past few years would easily secure the shoulder season for the next decade …
Cheers!
Ukee