Not having soaked in a hot spring for decades now, I recall going to one just back of Bridgeport to see human excrement floating in the water. I recall that it is just a two mile ski or hike to get to Buckeye from the Twin Lakes Road, could be wrong on that. Nice pretty girls, sans everything, like the MLC SC likes it!
Hot Creek also makes a good ski. There's another one closer by about Big Pine, as I recall, but all in my hazy past memory. The safest bet is Grover, by Markleeville. Unless it too is also closed.