This is a good destination for a day trip from Halong Bay. The scenery is every bit as spectacular as its more famous neighbour but Bai Tu Long Bay does not attract any where near the same number of visitors.
Charter a boat from Halong Bay for the five hour journey. It's best to try and organise a party large enough to fill the boat (around 15 to 20 people) otherwise the trip can be a little expensive.
There are many hotels in nearby Halong Bay