I don't usually post on this forum but had to reply to this. To be honest most fishermen won't disclose much about the GOOD spots they frequent. For obvious reason. It's the same for waterfowling spots too.
You just have to get out and scout. Put in your time. There are an infinite number of rivers and holes that get hit seemingly everyday. Combat fishing sucks to most of us so we go very much out of our way to find some honey holes. Then we keep them to ourselves.
Where you can go depends on the type of steelheading you are doing. A driftboat will open up a lot of river for you but can be difficult if you're by yourself. Most just hire a guide for this and are rarely dissapointed.
Bank fishing Is more limited but easy.
You live a short distance from some fine steelhead water. The Bogy, Hoh, Clearwater are all good rivers. Farther south you have the North, Nacelle and Johns Rivers. All good water.
I hit the Cowlits from time to time but it gets very crowded even when there is a lack of fish. You can put a lot of time in on the Chehalis without a hit.