We spent 13 nights at this RV park, parked among large Ponderosa Pine trees. The park has a nice indoor pool and large hot tub, but it's only open until the office closes at 8 p.m.
Mammoth Lakes has a wonderful biking and walking trail system that runs for miles beside the road up the mountain to several lakes and hiking trails. It runs right past the front of the RV park. The city's Visitor Center is across the street from the park. The park is about 40 miles from the east gate to Yosemite.
We were in a camping trailer, but there is a large area for tent campers, complete with bear-proof storage boxes. Yes, they really do have bears, so make sure you don't leave any food or other scented items in your tent or your vehicle.