Ran;
Interestingly, the grass "islands" in a few bunkers at Maidstone were put in by Jess Sweetser, who was working in some communication with Perry Maxwell from the late 30s thru the early 40s, according to what apparently are some sketchy club records. They were a Maxwell favorite, as evidenced by Prairie Dunes.
The book, "The Maidstone Links", (author not available at the moment as I'm at work) presents all of the known archictectural attribution of Maidstone to date.
The best way I'd describe the current course based on my understanding of the book is 80% Willie Park Jr. and John Park, who took early iterations of the various efforts there and refined, expanded, and consolidated them into what could fairly be called a "new course in 1924 , 10% refinements after him by Perry Maxwell, Dick Wilson, Alfred Tull, and Brian Silva, and 10% that would seem to very possibly be the remnants of Seth Raynor's 1921 work (such as the 1st & 2nd greens) (the author presents a good case for that, although 100% proof is not available).