involve a shuttle bus ride from either the Friday Center (good choice) or the Mall.
I've parked at the Friday Center a number of times and it's a relatively quick bus trip.
The Friday Center makes it easy to depart after the game with relatively good access to I-40.

You'll end up with much better seats at Duke than at UNC. With the seating reduction at UNC Kenan, it remains to be seen how many tickets will be available to visitors via their ticket office.

Good luck.