Linda, it's too bad you're having to postpone the infusion. Community resources probably aren't available in your location? There just might be some service available that would clear the snow for people in remote situations who are unable to get out due to snow and ice. I don't suppose the local MS Society chapter would have any answers?
It sounds as if it's all settled for now, but in the future maybe there's some option out there that would work. Might be worth a try if you haven't already looked into the possibilities....