
Amtrak does arrive from Raleigh early enough on train #73 or #75, but departure times are not going to work at the end of he game except for #78 back to Raleigh. From the Charlotte/Triad side trains #80 and #74 work but nothing southbound after the game on Saturday.
Of course one could spend the night in Chapel Hill and have 4 trains north to Raleigh or 4 trains South to Charlotte on Sunday. One train north would even take you to New York without having to change trains.
PART Transit in the Triad does have a bus route from Greensboro to Almance then on to Chapel Hill that arrives early enough for the game but alas, the return trip is before the game ends.
https://www.partnc.org/170/Route-4
I guess I am driving myself and parking in Friday Center.
I did contact Chapel Hill Transit on Facebook about their thoughts on the best parking for Triad <> Chapel Hill drivers and Friday Center or the lot on MLKJr Drwas their suggestion. The Chapel Hill transit buses are going to start running 3 hours before game time based on what they told me. Not a free ride but a discount for a round trip to and from the park and ride lots to the stadium.