Originally Posted by Forest Grump
Great choice, love Twin Lakes, Lake Mary, June Lake etc.
The OP has a 42' mh...no way can he/she get it over that little bridge to Twin Lakes, and I seriously doubt if it can fit anywhere in the main campground of Lake Mary. My very good friend is the camp host at the small campground at the other end of Lake Mary and maybe the OP can park there, but there's only about 10 sites. About the only place in Mammoth would be the rv park in town that can handle a mh of that size.
June lake at Oh Ridge would work, but it is mainly just a parking lot with hookups.
Glass Creek is a free BLM area and can fit large rv's but no hookups.
Further south at Lone Pine is a nice rv park (Boulder Creek) and much closer to the OPs home. Lots to do and see at Lone Pine.
Places in Bishop...again lots to do and see.
Hwy 395 has lots to offer... from 4000' to over 9000' feet.