| Camp sites are reserved in King's Canyon by filling out an envelope with your info/campsite info, putting money in the envelope, and putting the envelope in a box.  You get the car tag at the park entrance, but that's separate from the campsite.  Sites are entirely first-come first-served and not assigned by rangers. 
				__________________'He who receives an idea from me, receives instruction himself without lessening mine; as he who lights his taper at mine, receives light without darkening me.' 
-TJ
   |