If you're looking for salmon right now, tidewater/lower river access on the Tuck is limited, but there is some. There's a park/boat launch across the bridge (and take a left) at Pacific City, and occasional spots between there and Hebo, and slightly above. Once you can see the river from 101, it gets easier.
I'm not sure where the exact deadline for salmon is (but someone here does). Once winter steelhead start coming, there's access upon access on the upper river, which is easy to get to from McMinville (head down through Carlton).