I live in Manchester. If she was leaving at night, then there is no reason why she would come up this way to shop. All stores close at 6:00 on weekends in the winter. If it was to get food, then there are just as many options in Bennington and on the way to CT, to not come this far out of your way to eat.
I would think that if she fell through the ICE there would be tracks or such by the time her car was found Sunday. IT snowed here heavily until 2pm and didn't start raining until about 9pm on Saturday. Plus, based on the Reddit post from her friend, why would her cell and wallet be left in the car on the front seat if she was just quickly jumping out to visit the quarry, which no one does on a snowy, rainy night here.
The big question that I have, which was referenced earlier, is at what level was the seat set on. Was it for a driver her size, or was the car moved here later in the Night/Sunday morning? Does anyone know what time the car was first spotted in Dorset? I would think that plows were still on the road by the time she would of arrived and would of called in an abandoned car to the police which would give a timeline to us of, did she go right to the Quarry, or was the car brought there much later than when she first left Bennington.