We climbed there several times last winter and it wasn't bad, the routes on the far end of the wall (North by Northwest area) are probably better, there was alot of ice on some of the other routes as the area tends to run water so be careful and wear a helmet.
Climbing there in the winter is good. do not miss Dandyline on the way in. It is a sweet WI 3+! Oh, your rock climbing. Sorry, when I think of winter it is for the great ice climbing that forms on Cedar!