Jim:
Automobile Club of Detroit changed its name to Pine Lake around 1921.
Here are a couple of articles touching on Park's work in the cities noted in the Happy Valley writeup (which was the focus of my question), all forwarded by Jim.
I've updated the list to note in bold the courses we can confirm he worked on in 1916.
Baltimore -
Rolling Road (although his work is given a date of 1920)
Detroit (5 courses) -
Meadowbrook,
Pine Lake (aka Automobile Club), Cascade Hills?,
Flint,
Red RunMinneapolis -
Minneapolis GCNew Britain - this would be
Shuttle MeadowMeridian - a 9 hole course in Meridian, LA was organized in 1917
Plottsville (Pottsville?) -
Schuykill CC (work is given a date of 1921)
Reidsville - assuming this is the town in NC, which didn't get a course until 1931
Boston - this is the Canton course,
Milton-Hoosick His work at North Jersey is a new one to me. Also, the second article confirms Drew's questions on Sylvania, and adds in his doing work at the Toledo CC around the same time.