David,
With 36 holes at your disposal you're in for a treat.
I'd suggest the 2nd and 4th nines as your first choice with the 3rd and 1st nines as the second choice.
Four holes on the 1st nine have been redone due to the tennis courts. I'm not fond of any of them. So has the 4th and I believe 5th green.
Other holes such as the 2nd, 3rd and 4th on the second nine and the 6th on the 3rd have been redone, mostly at the green end. Some of those greens became too severe for modern speeds, which is unfortunate as they had tons of character.
Bobby Jones called Montclair the longest short course in America. I think you'll like the Donald Ross, Charles Banks golf course.
Let us know your thoughts after you've played it.