We walked that path MANY times on our last trip because our food court was closed at POR. While it is not very long, parts of it that are between the resort builings are a bit isolated, and as I was walking back one evening with dinner for my wife and I, it crossed my mind that I would have been a little uncomfortable with her walking it alone at night.
Obviously, the chances of something happening are very small, but personally I'd be a little cautious. There were a few occasions when I passed no one on the entire path between the resorts. The river is directly beside the path on one side, but on the other side there are wooded areas.