It looks like a muscadine grape! Lucky you! When I lived in Arkansas we had them growing up the trees in the backyard. The fruit are delicious and my dad used to make some wine with them every once in a while. There are a few wild grapes that aren't terribly edible, but I think in your area the muscadine is the most common.
I think so it is grape leaves as it looks similar to that and wine is made form it only or you can ask my aunt on http://www.coomberlaw.com/ as she posses much information related to it.