What part of California did you come from, Emma?
I believe windshield wiper fluid already contains anti-freeze. At least, I've never seen anyone change their wiper fluid or add anything to it as the seasons change.
Then again, I'm usually on my bike rather than in a car. Make sure you keep your bike gears clean, by the way. The roads are often sanded and that can eat up your gears. Take it from someone who should be following this advice more closely... Other than that, Paul's idea about studded tires might be more indispensable than you think (depending on how much you use your bike). If you ride onto an icy road that you don't know is completely frictionless because it still looks like asphalt, you'll be grateful for some extra grip. Also, wear layers. I haven't perfected this at all, but just take into consideration that it will be absolutely COLD outside and you can still break a sweat.
I hope you like it here so far. Maybe you could answer the thread about what brought you to Missoula.
