The Twin Lakes Campground near Mammoth Lakes is the hardest-to-book campground in California and the ninth most difficult in the nation. The campground offers 94 camping spots for tents and RVs, ...

RV Camping at Mammoth Campground RV Max Length: Campground sites will accommodate a maximum length of 45 feet between May 1 through mid-October and a 30-foot limit in the winter months of mid ...