This has gotten me thinking...I think I would start in Maine. The southernmost 18-hole course is
Boom Field. Start at sunup (say 6:00am), play a quick round there (~60 minutes), be on the road to
Bellamy Park, arriving by 8am. A round there (again, ~60 minutes) and then you could get to
Amesbury Pines by 10am.
So that's 3 courses and 3 states crossed off an it's not even noon. There are three more states with a course within a 3ish hour drive of Amesbury. I think I'd head towards Vermont, and hit
Austine to make 4 in a day. I'd end the day by beelining to Rhode Island for the night.
Day 2 would start bright and early at
Ninigret Park. From there, I'd head into CT and hit any of the courses right along I-95. The goal would be to hit the NY border by noon with two courses under the belt. Then I'd play
FDR or
Kisco before moving on to NJ.
There, there's 8 states in two days, building in a good six day cushion for some of the big western states and/or Hawaii and Alaska. No doubt PA/MD/DE/VA could be done in a single day as well, adding another 3 days worth of leeway.