I would go for the 17-85 since its the widest for landscapes. If you want something for sports or closeups, take the 100-300. I would just take the 17-85 since it has IS.
Only thing you need to watch out for is the sudden change im temperature from going out in the cold to back indoors. Take some ziplock bags and keep the camera in there for 20 minutes if going from inside to out or vice-versa.