HW:
Without reading through this thread again, I do recall posting this subject for basically one reason--to try to prove that despite some opinion to the contrary (and definitely on this website), some of the Golden Age architects were very interested in the use of trees on golf courses and for a variety of reasons. It's important, though, to understand exactly what those various reasons were by those architects.
However, having tried to point that out it's most important to understand why and how they recommended the use of them. I would also offer the very important caveat that trees on golf courses have also been massively misused, misplaced and misunderstood by many other people through the decades due to lack of overall architectural understanding.
I'd be happy to talk with you about your course and your plans but would caution you that I'm not an architect and to remind you of the very important specific advice of those same early architects to clubs and committees to ALWAYS consult an architect about these things.
Ron Prichard is a very good man and architect--he, as well as anyone, understands these older courses well, their architecture, their original intent and principles, and very much in the context of the thinking of those early architects who built those courses whether that had to do with trees or other things.
And none of us, even the architects, should ever forget to consider when planning the use of trees, particularly their placement for any reason, how big some of them can get after we're gone!