The springs at Grover gurgle out of the hillside into a beautiful U-shaped alpine meadow. So it should be a groovy, enchanted place, but sadly it is managed by the State Parks system, who do their darnedest to make it prosaic and institutional. The pools are a couple of rectangular concrete tubs - a big one with lukewarm water, and a shallow (3 feet) one, maybe 40x20 which they keep at a pleasantly toasty 104°. You can look over the fence on the uphill side and see the water burble out of the ground and down a sluice to you. There are showers and cubbyholes to store your stuff. There is a campground, which I have never used since it's CA State Parks expensive and there is boondocking three miles down the road.
In the style of Inyo Forest campgrounds(*), this one is hard to find(**) and kind of shabby and rough, but it's in a really beautiful location. This one is on Lee Vining Creek, in the aspen/pine forest on top of the glacial till. It's the first campground on CA 120 west of Mono Lake heading up to spectacular Tioga Pass. It's pretty cool. It's very popular with fishermen. (*) Except the Inyo campgrounds around June Lake/Mammoth. They are run by a concessionare. They are a little nicer, cost twice as much, and have three times as many rules. (**) There is an arrow for "camping", but you must turn off the road to see the "Lower Lee Vining"sign.
When Silver Lake Campground is full, this parking area a few miles down the road is open for camping. It's just parking and a few [picnic tables, but it's quite scenic.
At the Rainbow Road exit off I-80. On the South Yuba River. Super nice place, even if the freeway is 200 yards away. If you're familiar with the CA to Reno run, there's a place where I-80 crosses some beautiful rapids. This is about ½ mile downstream from that.