Winter in the Uber is nice unless you need to cook/etc in a blowing storm. Maybe listen to Dave on that if you're expecting some weather.
FWIW - here are some trips I got out in with mine.Mt Sill Split in a storm Lee Vining in a storm Winter Palisade Traverse Bail
If you don't have a sleeping bag with the "waterproof" shell like I do, Dave's light cover is a must for winter camping if you're in any kind of weather. You can carry it on the summit push as well for an emergency bivy. It's almost impossible to avoid snow/condensation from getting all over everything, unless you're carrying a 10 pound double-wall 4 season tent. We go single wall tent typically (if not in the Uber), so condensation is a problem. Sleeping bag = happy with a protective cover if you've got a marginal shell material.