Snowdocking in the Sierra: are there ungated areas?

Green, I like the White Mtns idea! I doubt the tent is going to happen, even though it would radically expand our horizons -- I am at the age where if I try to sleep on the ground, it would take a crane to get me back to a standing position. We missed the boat on backpacking -- we should have done it when we were younger, but we mistakenly thought that we did not like camping, so we never tried it.