If your Plebes-to-be want to meet, you'll need to do it before I-day (or after, I suppose). That morning, they won't be thinking of anything but being on time to report in.
If it's parents only, AF6872's ideas are great. One of my favorite spots on the Yard is by the seawall near the Trident light.
If your Plebes-to-be already have an older copy of Reef Points, now is the time to confiscate it! There is (at least in previous versions) a section on the history of the Yard and all of the monuments. It is a GREAT thing to have with you on I-day, and believe me, they will NEVER want to see it again!