Defining and regulating recreational gold prospecting; requiring recreational gold prospectors to obtain written permission from landowners before entering and prospecting on private property and from the appropriate state or local government unit before prospecting on public property; requiring river bottom and bed restoration; setting the season for recreational gold prospecting; specifying certain prohibited activities; requiring a permit from the commissioner of natural resources (DNR) for motorized recreational gold prospecting with certain larger suction dredges, specifying certain permit application and fee requirements, permits to be nontransferable (mk)