The upper river from snoqualmie to the confluene with the skykomish mostly holds mergansers and goldeneye if there is sheetwater anywhere in the valley, which is true for most of the season. But if that's what youre after, theres limits to be had. With the big freeze, I imagine more puddle ducks are tucking into little oxbow lakes here and there.
Further down river where it starts to slough out, theres lots of hunting to be had. Basically the last 10 miles from ebey island to the bay.