Gretna did not play a AAA North Carolina school. They played a 4AA North Carolina school. The school was Davie County high school, with an enrollment of just under 1900 students in four grades. The reason I know this is because I was there.
I now live in Davie county and a buch of co-workers (all Davie natives) and myself met at the game. I guess they thought since this was a small single A school from Virginia then it was a sure win for them. They tried to give me a hard time during the game but I got to walk out the gate afterwards with a big smile on my face.