We recommend you rent a car or stay at a hotel with a local shuttle (no shuttle to airport, though). We have plenty of free parking in our business school deck and lots of signs pointing you to the event.
There are many good options nearby at every price point. Chapel Hill is a pretty small town. Anything with a Chapel Hill address (and a shuttle if you don’t rent a car) will be pretty close. Some teams have rented a house using AirBnB.