Bill, I would suspect that the frustration on their end is more of a long term problem of people not donating as much as they would expect and this is just a particularly frustrating example.
If your looking long term, and all businesses are, with the total installation costs (clearing, mowing, tree removal, concrete, etc.), regular gas for the mower/tractor and other equipment, depreciation and maintenance of said equipment, any other out of the ordinary maintenance costs, property taxes for the portion of the land dedicated to disc golf, and liability insurance for allowing disc golfers on their property, there is no chance they aren't loosing money on both a yearly and long term basis by keeping the course open with the way they are currently collecting money.
As with all businesses, when you look at numbers in the red for long enough you realize you either need to shut it down or make a change. I for one think it's a fabulous course and hope that changing to a mandatory fee allows them to keep the place open and accessible to CCDG and the rest of the general public. Furthermore, I don't see any reason why we shouldn't do anything we can to help them keep it open and further refine the course so both parties can reap the benefits of a wonderful course.
To conclude, I think it's important to remember that Taloali is a private venture by a small group of people, not a park funded, run, and maintained by the city or state. It is a privileged to be allowed on their property to enjoy what they have created. The club and the players should continue to work to maintain a healthy relationship and respect the wishes of the people running Taloali so that the course and experience can do nothing but get better.