Hi WNCSweeper,
IT is illegal to hunt in NC state parks. If your caught by the right ranger who wants to pursue the state law to its fullest extent, the fine is $10000.00, jail time and they may go into your home and confiscate "All " of your artifacts. So, if I were you i would stay away from state parks. Oh by the way gals and guys, never mention looking on state parks on the web, because you never know who may be reading your artical...AKA an offical who will know the laws better than we do.
PS
This happened to two relic hunters about 25 years ago,who were hunting on grounds of The Battle of Guilford Court House in NC. So please don't try it, it's not worth it.