I find my winter riding becomes very selective and manage to still ride 3/4 times a week relativly mud free. Certainly no slogging about in mud.
I ride on top of the hills, not the valleys. I ride in sandy/pine tree places and choose trails that are not used by horses/walkers/tractors.
Having said all that I do miss some of my usual trails that only work in the dry – but that makes them better when you do get to ride them as your looking forward to them.
Dont forget, last winter it was quite dry in Feb/March. I can recall many a dry frosty and even dusty night ride in the Chilterns.