Welcome aboard! You have a ton of fishable waters in the area. It all just depends on how far you want to drive. Glad to have ya and hope to see a ton of fish pics. (We love those if you couldn't tell)
Corvallis is close to the South Santiam which gets a run of springers, also summer and winter steelhead. The Alsea has had a few bad runs of winter steelhead, but hopefully this year it will be back to some good numbers. The tidewater of the Alsea is good for fall chinook and is one of the best places to crab. Right now the Mckenzie and Upper Willamette are producing quite a few springers and summer steel. I've never fished the Siletz, but I see a lot of pictures of nice fish that are caught there. If you are going to a particular river, I'm sure someone will give you a good place to start.