Makes it unlawful to enter onto another's private lands to hunt, fish, or trap in Rockingham County without the permission of the land owner or lessee. Requires either written (for posted land) or verbal permission (for nonposted land), as detailed. Sets forth additional details for posted land. Makes a violation upon posted land a Class 3 misdemeanor, punishable by a fine of not more than $250 for the first offense, a fine of not more than $250 for a second or subsequent offense or by imprisonment for 30 days, or both. Makes a violation upon nonposted land a Class 3 misdemeanor, punishable by a fine of not more than $125 for the first offense, a fine of not more than $125 for a second or subsequent offense or by imprisonment not exceeding 30 days, or both. Clarifies that a hunter may retrieve a hunting dog from another's land, provided the hunter does not enter with a firearm or other hunting weapon. Authorizes enforcement by law enforcement officers of the Wildlife Resources Commission, by sheriffs and deputy sheriffs, and by other law enforcement officers with general subject matter jurisdiction. Applies to offenses committed on or after October 1, 2011.