James Moore said: Don,t you have unfixable ball mark damage or do you light top-dress biweekly to cover damage? 
James,
A third or so of our winter play is from our pass holders who take good care of the course. The fee play is mostly from die hard better golfers from area private clubs that are closed and they do a decent job taking care of the course too. Thus, the greens don't look any more beat up than they do in the summer. We do not topdress before or during the winter.
The worst golfers seem to be the discount golfers playing on the winter rates from about late March or when it warms up to April 15 when our rates go up, then again from Mid October, when we punch greens and drop our rates, until mid November or so when it gets too cold for them. All areas of the course take a beating during those times: unrepaired ball marks and divots, carts in restricted areas like no mows and off paths by greens and tees, unraked bunkers, etc. The only good thing about April 15 is our rates going back up.