The valley I live in is great potato farming country, in addition to having lots of alfalfa fields and other goodies deer are partial to. Once the potatoes are half grown, many deer will be in the spuds regularly, in addition to but in spite of other crops being available.

After the potatoes are harvested, deer flock even more to the fields to take advantage of any spillage. In fact, they are quite good at pawing up any leftovers as well. They will be in these fields all the time well into winter and many people around town get bags of culls to feed the deer over winter.

So yes, they do like potatoes.