This may be a diversion, and if so, please ignore. No highjack intended. A week ago last Sunday I played Malone GC in Belfast, a very, very nice parkland course. They have what I would call an arboreatum program under which members can pay to plant trees. They look for variety, though I am not sure about the native vs. exotic issue.
However, "strategic" trees may only be planted with under the control of the golf committee. Sounds good, but although a beautiful and good course, my sense was that if not over-treed now, the course was likely to become so in the future, notwithstanding the golf committee's oversight.
I like the idea as they appear have plenty of property to create an arboreatum around the course, but I'm not sure about the execution as it appears to a first-time visitor.