I have given up a Muir Trail Ranch Tent Cabin reservation for the nights of July 29/30 2013. This makes the Tent Cabin available to rent either in a back-to-back 2 night situation or for two different single night stays. If you have not stayed at MTR you are really missing a Shangri-La experience. With their natural indoors hot springs (2 cabins that lack ceilings but have full height walls for privacy, gives you a private hot springs experience with privacy). Their hot springs rooms each have a bathing area and shower, and a pool area. You're expected to cleanse yourself before getting into the hot spring pool.
They also have super great food, a lodge, laundry, and free lemonade (for log and tent cabin guests).
The Tent Cabins are newer than the log cabins but the tent cabins do not have bathrooms but a bathroom building is within about 20-50 feet away. The cost for 3 meals, hot springs and laundry use, and sleeping facility in the Tent Cabin is $140 a night. A very reasonable price.
Every year I do the JMT I attempt to stay here, and have succeeded except in 2009. I've enjoyed staying there in 2008,2010,2011,2012 and will be in 2013.