Stop by the fly shop, they used to and probably still do have free maps for areas of the river to wade. A lot of it is going to depend on flows and the available time you have to fish. Posse grounds ie sundial bridge area and by the other two briges in town are areas I've waded in the past.
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Winter eats heat the way darkness swallows light. The terrors of failed power and frozen stems are stymied with fire, smoke and white ash.
Definitely stop there for a map (and hot flies). There are at least a half dozen excellent areas including turtle bay, girvan road (sewer ponds), cascade park, anderson park, balls ferry, jellys ferry. The posse ground gets heavy traffic, lower areas less. Wade carefully, use a staff. Google earth will show you a lot of the good water, trails, etc.
Flows at 4000 which is wadable most spots; take a wading staff. Rich is right, flows in November to January are often down to 2000-3000, which are easier