I have much less experience going to tournaments than you, but I had a similar reaction, mostly because I've heard forever about how much elevation change there was.
Another thing I'd heard about but noticed on my own too. I can't say I was looking for bugs, but I too didn't see a single squirrel.
The best part of this was that I was there on a particularly warm day, so it was nice to just be able to swing by a concession stand and grab another "sports drink" or "diet cola" and only be out a buck or two. I honestly thing I had 10-12 cups worth, because why not? If I tried that at the PGA or U.S. Open I'd go bankrupt in a day or two.
They even had the nicest security contractors I've ever met. We struck up a conversation with one guy in the grandstands behind the first green for a bit during a gap in practice round groups teeing off.
I definitely had a few moments where one would have been nice to have (and totally agree that it's crazy for people working there to not be able to have them), but at the other tournaments I've been constantly shocked how cavalier people are about using their phones to make calls.
The Masters is also the only tournament (among itself, the PGA, the U.S. Open, and the Dell Technologies Championship) that I've been to the past two years that has allowed me to bring in a drawstring bag. It was a practice round, yes, but as far as I can tell there's nothing that makes them against the rules for regular rounds.
That was great - not only did it fit my camera bag, but the big thing was I could bring in sunscreen. I had to buy some at the U.S. Open, and to fit it comfortably in my pocket at the PGA I brought a bottle so small I ran out mid-day. (I'm very white.)
I followed him during his practice round (with Justin Rose and Thorbjorn Olesen) at the PGA, and I kept missing getting a picture of that. Here's the closest I got:
Weirdly, his putting stroke isn't far off: