Possession and consumption of beer and wine prohibited: It shall be unlawful for any person to possess or consume beer or wine, as defined in Sections 123.3(7) and 123.3(37) of the Code of Iowa between the hours of 10:30 p.m. and 6:00 a.m. in or on any area, except beer or wine may be possessed within a camping unit or out of sight between said hours by an adult member of any camping party or an a