ZZ I second the advice to make a reservation for the restaurant, also to bring sunblock. See if there's an order of ceremonies available so you can plot when you arrive, so you don't end up sitting through the medical school graduation or all the PhDs or whoever else is graduating that day before your DD's ceremony. We made that rookie mistake when DD1 graduated. After they were finished with the PhDs, all their families got up and left, and we got better seats.
Then The College trooped up the center aisle of the quad in their caps and gowns with quite a bit of ceremonial, and after a great deal of speechifying, the ceremony proper began. I can't remember if there was a star speaker - can't have been too exciting if there was. DD2 had Anne Applebaum. Caps were flung afterward, with lots of applause. There was a bit of the usual huzzahing during the ceremony by some families, too. Families brought bouquets for their graduates.
DD2 had a Ball the week before her graduation and hit the town in style with her roommates the night before. We went out for a casual meal at one of her favourite eateries afterward. She and her roommates were in need of a nap that afternoon, so we left them to it. She spent the next day packing all of her stuff, and we schlepped it home on a plane that night. Everyone had one huge suitcase, and the TSA made us open them all as DD had amassed a large candle collection and had a set of elephant shaped bookends in there as well.
DS' graduation was indoors and took ages as the speakers droned on forever, and his school was one of the bigger ones, plus our surname is at the end of the alphabet. We had a restaurant reserved for brunch but when we got to the car park, we realised I had a completely flat tyre. The spare was hard to access and in very poor shape, but we made it to the restaurant - we had two cars as exH had driven separately. I left immediately after what turned into lunch - we were late for brunch thanks to the flat - for Walmart to get a new tyre, while exH left DS and the DDs at DS's room to pack, and then we all went home with DS' boxes and bedding, plus a mini fridge, packed into every nook and cranny of the car. We stopped at a Steak n Shake on the way home. Bliss.
I seem to remember the national anthem at each graduation, and the pledge of allegiance.
We took family photos at camps landmarks after each graduation. I didn't buy the professional photos.