Everything you need to know -
Colorado State Patrol - Chain Law InformationI don't tow my TT up here during the winter. I do have a set of chains in my truck, sort of a pass in the event I am asked if I have them but that has never happened. Those chains have never touched pavement.
Do standard cars/trucks use chains here? I think I've seen it once or twice. Most use winter traction tires or studs. But, be prepared. Vail Pass is supposed to be getting 1-2 feet of snow right now. This is not abnormal.
Be safe and check ahead -
Colorado CoTrip.org - Interactive Road Conditions