Tom,
The Stanley Thompson Society claims he possibly worked on the course in the 1920's, but to the best of my knowledge, no proof has ever surfaced. Back when I was the assistant superintendent there (1988-1993) I "found" an old plan for the original irrigation system that was installed, sometime in the late 1910's. That map was the routing of the course that existed until the club's major remodel in 1989, when four of the original holes were lost. So, if Thompson did do anything there, it certainly didn't have anything to do with the routing. Plus, the course opened on it's current site in 1904-1905- Thompson would've been a bit young to pull that off...
In Michael Riste's book about A.V. Macan, he credits Macan with doing some work to the course. I don't have the book in front of me, but I recall it being seeral smaller projects/tweaks to the course.
Scott