profsparrow: Congrats to you and your son! You mention BFE#2 in your OP. Did your son get two offers, or has a previous DS/DD received an appt?
IMO, being present on I-day is more for parents/family, while PPW is more for your Plebe. Even though things do change a bit from year to year, many things stay the same. Here are things that have stayed with me from our I-day & PPW 4 years ago(!)
I-day minus 1 was a great day to tour the Yard, go to the Mid Store for the first time with our then Plebe-to-be, and have a relaxed time taking photos, etc. On I-day, we had the earliest start time (0630), so it was nice to know exactly where to be. After ~ 30 seconds in line, DD was through the doors (Note: she still, to this day, refuses to use those doors unless officially required to do so!) We spent the day taking various tours, finding places to watch Plebes, etc., then went to the Induction ceremony. 20-30 minutes with new Plebe trying to keep her whiteworks straight and clean.
Fast forward ~6 weeks to PPW: First Town Liberty from end of Friday noon formation to ~11:00 or midnight. That first time seeing YOUR Plebe in Summer Whites: PRICELESS! No messy meals allowed, but wonderful for Plebe to be out and about. Learned about "Plebe hack," listening to the coughs and hoarse voices of every Plebe in town. Had Plebe with us all day Saturday - very rainy - watched the Olympics on TV at hotel as Plebe lounged about. Sunday - went to Chapel for the first time. Plebe had joined the choir, not knowing that it would change her life by introducing her to Women's Glee Club.
Best wishes to you and all of the soon-to-be Class of 2016. May your "four years by the Bay" be filled with as many friends and successes as ours have been.