The cruise was -to my relief- not as busy on the waters as I thought it would be. And the boat was moored at a quiet location quite a distance from other boats so we had a sense of privacy and the water was clean and perfect for swimming and the morning-after kayaking. Try to get a room on the 2nd floor if you don’t sang yo bd bothered by the locals on sampan outside your window selling stuff!Tour guide informed us that the government has relocated all the oyster farms and fish farms to prevent further pollution to the bay- good move to return Halong Bay to its pristine natural beauty! Definitely recommended to do a one night cruise!