First ever snow portraits! Help!

So I was asked by my brothers girlfriend if I would do her senior pictures. We set the date, and we are doing them tomorrow. She said she would like them done at this place that is outdoors. The problem is, it snowed last night and is supposed to snow again tonight DX This will be the second set of senior pictures I have ever done and the first time taking portraits in the snow O.O Anybody got any tips for me??? Any at all would be appreciated!