The funny thing is, in the scene just before she gets up on the ladder, we see the boots on the floor…sans Anna…yet she had them on when she fell. Oh-oh, where’s the continuity editor?
As to it being the Horton cabin, the only thing I see different is the door. The one where Anna is has a glass insert that the Horton cabin doesn’t have. Also, the fireplace is on the wall to the right as you enter. At the Horton cabin it was straight ahead. It probably IS the same set with just a little rearranging. As someone mentioned before, it could be the Green Mountain Lodge. Although why she would be putting a wreath on the door of a hotel is very head-scratching.