Bill,
Growing up just an hour down Route 70 I was lucky enough to go to the Memorial nearly every year of my youth when my dad and I made the trip. I was also lucky enough to caddie for my buddy during a junior tournament there but have not been fortunate enough to play the course.
Just some thoughts...
Heavily sanded? Your pics defy that comment as they look quite pure for having just been punched!
On two, I believe the pond is more right or front right with the stream resuming behind the green. Jack might have tinkered with that green site though as he loves to make changes yearly as you said (and not always good ones!).
It is somewhat misleading to list the championship yardages...1,2,3, & 4 all play downhill from the tee and don't play as long as 470, 455, 401, etc. Jack does want it to challenge the best players though...
Lastly, I know you have a ways to go and you are not there yet, but 15 might be the best par-5 with it's tough tee shot, fantastic topography, and risk-reward second. 5 is totally unique and maybe the least well known as the TV audience rarely sees it as it sits so early in the round and 11 is probably the most natural hole on property.
By the way Bill, where are you from? OH?
Looking forward to the rest of your tour.
Cheers