14-159.7. Regulations as to posting of property.
For purposes of posting property under G.S. 14-159.7, the owner or lessee of the property may use either of the following methods:
(1) The owner or lessee of the property may place notices, signs, or posters on the property. The notices, signs or posters shall measure not less than 120 square inches and shall be conspicuously posted on private lands not more than 200 yards apart close to and along the boundaries. At least one such notice, sign, or poster shall be posted on each side of such land, and one at each corner thereof, provided that said corner can be reasonably ascertained. For the purpose of prohibiting fishing, or the taking of fish by any means, in any stream, lake, or pond, it shall only be necessary that the signs, notices, or posters be posted along the stream or shoreline of a pond or lake at intervals of not more than 200 yards apart.
(2) The owner or lessee of the property may place identifying purple paint marks on trees or posts around the area to be posted. Each paint mark shall be a vertical line of at least eight inches in length, and the bottom of the mark shall be no less than three feet nor more than five feet from the base of the tree or post. The paint marks shall be placed no more than 100 yards apart and shall be readily visible to any person approaching the property. For the purpose of prohibiting fishing, or the taking of fish by any means, in any stream, lake, or pond, it shall only be necessary that the paint marks be placed along the stream or shoreline of a pond or lake at intervals of not more than 100 yards apart. (1949, c. 887, s. 2; 1953, c. 1226; 1965, c. 923; 1975, c. 280, ss. 2, 3; 1979, c. 830, s. 11; 2011-231, s. 2.)

He should have dropped the charges after your apology. If you guys started setting up on the property AFTER realizing you were tresspassing, that would've been one thing but you apologized and turned right around. No harm done. Guess that shows how lawsuit happy some people are.