It’s not about the car…traction tires rated for snow and hopefully, would be nice if 4x4 drive. You won’t need chains if you have traction tires but put them in the car just in case. There could be a lot of snow or no snow. I drive over to Winthrop once a month. Last year in early January I-90 was closed for 4 days due to 2 18 inches of snow in 24 hours. Be ready for anything! I always drive I-90, Blewett pass. Highway 2 is mostly 2 laner and dangerous, many fatal car accidents there.