Snow socks are for slippery emergencies, not for planned use on a trip. They wear out quickly and don't do much good in deep snow. If you're just worried about getting stuck in a slippery patch, by all means, throw them in your trunk and hope you don't have to use them. Think of them like a bag of sand but that magically stays with your tires, just giving a bit of extra grip. But plan A should be winter tires, and a nice place to wait it out should you get more than a couple inches on the road given the Air's ground clearance.