Salmo you were correct, I did find a couple surveys that did mention harvest as a limiting factor, however given the overall picture, it would appear that these Hood Canal steelhad are having an issue with outmigration.
I also found this link that shows a very bleak picture for Washington salmon and steelhead populations.

http://wcssp.org/WCSSP_library/regional/LFA_Washington_State_2005.pdf