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Raspberries and blackberries can be weedy out in the countryside - they will do fine.
Blueberries are in the same family of plants that includes cranberries (and also azaleas) and they LOVE acid soil - try coffee grounds in compost or as mulch.
Grapes can be done - muscadine grapes are actually native to NC and VA (and nowhere else), and thus are most perfectly adapted to the quirks of the climate here.
Cape gooseberries are an annual that will do very well - growing requirements are identical to those for tomatillos. They mature very quickly from seed, and will give you a good crop of fruit before frost takes out the plants. They will need to be well-staked or put in tomato cages to climb. Beautiful plants (kind of like a big lanky pepper plant) - pest magnets however - aphids, whiteflies, beetles and spidermites will love 'em to death.
Various types of mulberries are fairly common around here - the fruit quality can be highly variable in the wild trees, but a good nursery will probably have cultivars that produce better-quality fruit. The trees are long-lived and can get very large, so if you go this route, you might want to do some pruning.