This will probably give you the information you are looking for
Mammoth Lakes Campgrounds on CampendiumI always start with Campendium when planning a trip. It's a free site, but you'll have to create a login to see the information.
2011 Bighorn 3055RL, 2011 F350 DRW 6.7L 4x4 Diesel Lariat and Hensley TrailerSaver BD3, 1992 Jeep ZJ and 1978 Coleman Concord Pop-Up for remote camping
Dave & Renee plus (Champ, Molly, Paris, Missy, and Maggie in spirit), Mica, Mabel, and Melton