2 places you might try:

1) Northwest indian fisheries commission website.

2) The quinalt tribe website.

I'm guessing on these but they would be good places to start-maybe e-mail someone at one of those sights.

The dept of wildlife website might have something but I think you can call any wdfw regional office. Seems to me the fishing regs might have a phone number for a netting
schedule.

Let us know what you find out, i'm curious to.