Not enough info !!

But if it was considered a recreational area the TN law says ..

It is illegal to carry a firearm in public recreational areas. This rule does not apply to military or national guard personnel on active duty, U.S. civil officers within their official duties, students taking part in weapons training courses, registered security guards; and under certain circumstances, people licensed to hunt or display weapons at trade shows. (Tenn. Code Ann. § 39-17-1311.)