There were 4 people crazy enough to go to the lake that late in the season - us and couple of American backpackers and we had really wonderful time! :) Skeleton staff of Dalai camp took great care of us - heat up huge tank of water for piping hot showers, cooked us yummy Mongolian meals and Shishkhan (Mongolian girl who is a hospitality student working there on summer practice) would snick up into our tent at 5 am to start the stove, so we'd be warm when we get up later.