Hi there,
We just moved to N. Cal this summer from Anchorage Alaska, where I'm from. We have two boys who love the snow. My youngest is now 20 months old and I walked my older son to school everyday while we were up there. I would just put a long sleeved onesie on him and then some warm footie pjs, or if it was really cold, some pj pants, socks and then the warm fleece pjs and then his snow suit over that which was a really soft, puffy down alternative number from REI! Then I would put a light jacket on myself, put him in the front carrier, wrap a blanket around him and the carrier and tuck it in inbetween my body and him, and then I'd wear my husband's winter coat over the both of us!! A lot of work but we always loved walking together and he stayed plenty warm! I didn't cover up his tiny face though, don't smother her!:) Sometimes, if it was snowing I would put a light blanket over the top of him but always keep checking on him or I'd just carry an umbrella. For in the stroller there are these things you can buy, if you have a lot of money to spare, just like what you can put in the car seat/carrier, it fits in and it has holes in the back so all the seat belts and straps can go through and then it has a cover that zips over your baby. That way the wind isn't blowing at your baby's back and you don't have to worry about a blanket falling off. Usually they're made of that faux sheeps fur stuff. But like you said, I don't know where you can find all this stuff right now, if you're anywhere other than Alaska! If you go to REI up in Bend when you get there, you might be able to find some good stuff! And on sale, probably!
People live in Alaska. And there are festivals and all kinds of things, even in winter. You can bundle her up and put a snow suit over the top of her and she'll be totally fine. Even in a back pack. You're going to have SOOOO much fun!!
I wish I was going!!!