Not sure if either of you are local or not. But if you know the general area of Carroll you can find Oak Grove pretty easy. If not then I will explain how to get there from the VA/NC State Line. Go North on HWY 52 (from Mount Airy to Cana) about 8-10 miles to the foot of the mountain. Before you start up the mountain Rt 691 (the Bear Trail) turns to the right. You will go to the end of it, which will take you accross the foot of the mountain, and turn left. The church is on the right right after you turn, or you may go just a little ways, I can't remember since it has been several years since I visited the cemetery. If you are in the town of Mount Airy you can take Main Street north and after crossing the NCVA state line it turns into Rt 679. It is probably 10 up that road to the church.
I have a great-aunt and uncle buried there. Who were you looking for?