Picnicking is authorized in park areas except where such activity is prohibited or otherwise restricted by the Superintendent. The public will be notified by one or more of the following methods—

(a) Signs posted at conspicuous locations, such as normal points of entry or reasonable intervals along the boundary of the affected park locale;

(b) Maps available in the office of the Superintendent and other places convenient to the public;

(c) Publication in a newspaper of general circulation in the affected area; or

(d) Other appropriate methods, including park Web sites, brochures, maps, and handouts.