For those looking to do the entire circut starting from Leh, i'am including a detailed list of food and accomodation spots along this route.
1. Sakthi/Takthok monastery
Located about 45km from Leh. This should be your first stop. There are no guest houses in the Sakthi village but you can go the main market street (some 4 shops on either side of the road) and ask the shop keepers for accomodation. Many of them provide home stays.
The Takthok monastery is located some 4km away from the Sakthi village (from the market). Here you'll find a goverment run PWD guest house and the rooms can be had for about 300Rs a night including dinner.
From Sakthi, it is one straight climb upto Zingral (around 18km away). At zingral there is a army checkpost and you'll able to get some tea from the army mess and if you are lucky some lunch as well.
3. ChangLa pass
If you make it up to the pass, you can stop here for some well deserved tea and snacks (maggi etc)
4. Nomad camp
There is a nomadic camp setup near a small lake halfway between ChangLa and Tangste. During high season you'll be able to stay here and get some food.
Many restaurant and accomodation options available here.
Inbetween Tangste and the Pangong lake there are a couple of camping spots. Mugleb is the pretty one. There is a satellite phone here at Mugleb for public use. Ofcourse you can get the BSNL 2G mobile signal on the Pangong Lake. The signal is strong at the Lukung and Spangmik villages.
Located near the head of the lake, Lunkung has a couple of restaurants and tented camps where you can stay.
The first and the smallest of the 3 beautiful villages beside the lake. Almost every house in the village offers homestays. 2017 Update - Spangmik is no longer beautiful as it is overrun by guesthouses. Maan and Merak are still nice but it is only a matter of time before they are ruined as well.
No advertisements for guesthouses in Maan but you can ask for the home of the local headmaster and stay there. By 2011 he should have a couple of new rooms available for tourists.
Around 3-4 guesthouses here offering homestays. Some houses have inverters which you can use to charge your camera batteries. So be aware of this while choosing your home stay.