I have never ice fished in that area, so I cannot answer your first question.
There won't be salmon in the river at that time, but there should be some steelhead holding in the area. If the river isn't frozen solid by that time, you may be able to try it out. There are guides in the area but I don't know if they will be guiding in December due to inconsistent weather, and the probable ice buildup in the river.