Oh, to be in the South
Except for my introduction to disc golf in its first year in southern California, pretty much all of my experience has been on public park courses in the southeastern U.S. Except for Macon, GA and Reidsville, NC, where a park entrance fee is charged to every visitor, I've never encountered a charge specifically for disc golf, except at the extinct Bryan Park course, north of Greensboro. And that was only in the Summer, when the adjoining miniature golf course was open. Cedarock Park did set up a voluntary collection box for awhile, suggesting $3, to help in the acquisition of new land. It was poorly placed, missing all of the vehicles turning into the first parking lot for the open course and for the horse trails. I generally put a dollar in it, after getting out of my car, as the new land was (is?) supposed to include a new, nine hole beginners' DG course. It's a safe bet that none of the horse people, who put as many or more alcoholic beverage containers into the courses' trash cans as or than the discers do, while their beasts of burden crap and poop all over our greens, tees, and fairways never contributed anything to the collection box, despite that the primary use of the new land is going to be "a world class equestrian center", with miles more of trails. And they're not charged anything for using a whole lot more of the park that DG does.
Private courses must be much more prevalent in the North than around here. I know of only three in this general area, and only one of them is really 'on par' with the area's public courses.
In planning and implementing The SPC last year, the city R & P director was adamant about wanting it to be free to play. The parks can make money from DG in other ways, like getting a cut of tourney monies, and by selling DG stuff, like Cedarock and Lake Reidsville do. One of the primary draws to disc golf is supposed to be that it doesn't cost a fortune, like ball golf and other sports.