Looks like the homestead in the 18th green picture in the article still exists.
On google maps, it looks to be near the junction of Hunt and Currier roads a few miles north of Peterborough. There's a big field with a pond next to the buildings which surely was part of the course, but nothing else remains when looking at the aerial. Tough to imagine golf holes around/over the river as it looks very marshy, but it worked somehow!