these are the camping areas where credit-card holders may reserve by phone : ; grand canyon in arizona , 310 sites on the south rim and 83 sites on the north rim ; yellowstone in arizona , 420 sites at bridge bay ; death valley , 253 sites in furnace creek and texas spring ; joshua tree , 100 sites at black rock canyon ; sequoia-kings canyon , 250 sites at lodgepole ; whiskeytown-shasta-trinity , 150 sites at oak bottom ; yosemite , 1,172 sites at eight areas ; rocky mountain in colorado , 393 sites in moraine park and glacier basin ; acadia in maine , 306 sites at blackwoods ; assateague island off maryland and virginia , 152 sites at oceanside and bayside ; ozark national scenic riverways in missouri , 195 sites at big spring ; cape hatteras national seashore in north carolina , 136 sites at ocracoke ; great smoky mountains in tennessee and north carolina , 517 sites at smokemont , elkmont and cade 's cave ; and shenandoah in virginia , 217 sites at big meadows . ;