Kokanee are separate from your trout limit in the southwest region. All other salmonide or fish in the onchorynchis family are included in the trout limt and possession limit. Coho salmon, atlantic salmon, and landlocked chinook salmon count in your trout limit. So for example if you went to deadwood reservoir you could keep 25 kokanee per day and 50 in possession. and then you could keep 6 trout per day but only 6 in possession not 12 because unlike kokanee the daily limit is equal to the posession limit. The trout limit would include all Atlantic salmon, fall chinook, rainbow trout, and cutthroat trout that you caught combined to equal 6 fish. You would have to consume those six fish before catching another daily limit. Anadromous salmon or steelhead have separate limits and possession and different regulations and seasons and require a tag.
Thanks for thr education, it seems now it is even more confusing. I am heading to Cascade soon and I always thought the Kokes and Coho counted in the same limit sounds like that has changed. I need to read up.