Mike,
A side note, you probably cannot grow standard grapes, we have a mildew disease that affects grapes here in the humid south. But you should try muscadine grapes. They are a native southern grape. It is a little different, thicker skin, seeds, etc, but they are well worth growing. The best place to read up about them is at the Isons nursery website. They have great varieties.
blessings,
Gene