A few other things I would include for winter

A couple of tubes of sand (or more if you have a truck). Added weight on the rear axle and can be used for additional traction if you wind up going off road

Tow strap. If a Good Samaritan is willing to help, it could be for naught if neither of you has a tow strap

Shovel – for digging

2T Come-along – A means to pull a vehicle out of a ditch