i have been going up to the Eastern Sierra for a very long time and stumbled upon Glass Creek Campground a few years back. Now, I stay at Glass creek every chance I get. Its a great campground that does get pretty busy at times.
The camp host, John, is amazing. Ive seen some people complain about it but in my experience, if you just follow the rules and are a respectful camper you will have no problems with him.