Each of the rooms can easily accommodate 2-3 people and there are roughly a dozen of them.
I reached tangtse in the evening, stayed there in the night next day morning around 8 reached pangong and the view was spectacular and reached leh by 3 PMIs Tangste before the Mad stream or after. If its before, then its not a good thing, because after spending a nice evening at Panagong, you may find that you need to spend night at stream!
LOL, I think 100 mtrs is good enough!, every bit of accommodation is 100-200mtr away. If you really want to camp on the shore, you will have to carry your own tents and even then you might be stopped from doing that by the local authorities.