Inform Visitors of Park & Campground Regulations Voss Signs® Recreational Signs are ideal for use in state and federal parks as well as private campgrounds. Use them to inform your patrons of the rules and regulations in your park or to direct visitors to various activities located within your park. Signs are also available with Engineer Grade Reflective Sheeting, and can be printed on either aluminum or plastic. Signs are white with brown paint. Two holes and round corners are included. Call for more information. *Red reflective strips available. $.75 each (not applied).