I was there a few times this past summer on weekends, it definitely seems to be becoming more popular. As for the age demographics, there seems to be a healthy mix of all. Old and young adults, senior citizens, parents with small children even some teens a few times. Always more male than female, but not by too much, which is pretty common on all nude beaches I’ve ever been to.
There is a small but dedicated team who are always improving the beach and the trail to it. They also arrange nude indoor swims in the winter. According to the Facebook page the next one is on 13 Jan 2018.