The majority of the Canes contingent that I know of will be tailgating at the Chemistry Parking Lot.
If you type "Chemistry Parking Lot, Durham, NC" into Google Maps, it will give you directions right to the lot. Parking was $10/car last year.
As for designated sections...just get a General Admission ticket and go towards the orange and green. You won't be able to miss us. They really don't enforce assigned seating at Wallace Wade, so just get in the gate and head towards the open end of the stadium on the visitors' side, Sections 1-3.