In reply to Red Rover:
Unless you are talking about over Christmas, Dec should not be busy at all. A lot of tourist accommodation shuts completely during the winter but I would think there will be enough places open that you can still find somewhere to stay without too much trouble.
Tricky part is that now that international travel restrictions have recently been freed up somewhat, there are a fair number of people coming to the NW from overseas, whether that will continue apace in Dec is probably impossible to tell - just another of the unknowable knock-on effects of covid.
I'm on Skye and what I can say is that bookings have dropped significantly coming into November. I was pretty full in October (80%) but now have a lot of space (looking like maybe 40% occupancy). I will be closed from 1st Dec onwards. Of the two neighbours that I speak to regularly, 1 closed their bnb a couple of weeks back and the other will stop taking bookings for their challet for most of the winter.
I guess Jan and Feb are probably slightly less busy than Dec but I can't imagine that you will be avoiding the madding crowds.