I need a beautiful camping in northern California, near a lake?!?

I am a recent resident of Marin County, California. I bring my boyfriend 5 years to a beautiful camping site is near a body of water (a lake of preference). I'm not familiar with the area and do not really have anyone here to recommend anything. We are a couple simple love outdoors, fishing, hiking, etc. and any help would be appreciated!

For years my family has rented cabins at Pinecrest Lake in the Sierras (hour/20 half miles northeast of Sonora, easy to drive to) – It's beautiful and the people who go there are so easy to go (finally a place where you do not have to worry about the guy next to you is a serial murderer, lol) but camping near the lake is super-full (I call it neighborhood because the campers in public). There are cabins for rent large near the lake, see Goode Realty Brezina if this appeals to you. Or you can look at places in Tuolumne County (call Parks and Rec or visit their site) that can go hiking or even for horses and pack in. There are plenty of small lakes and I doubt you'll find something isolated, provided they are not in high summer. It is a beautiful place and a permanent part of my life.

Camping at Silverwood Lake, California