Booked a private tour with Hai (Adventure Indochina, Hanoi) from Hanoi to Halong Bay, including afternoon cruise, for 4 adults. Enjoyed private van transfer to Halong Bay and had a whole junk to ourselves for a fabulous 4 hour cruise with seafood lunch - and our own tour guide Mr Son for the whole day! Fantastic experience and awesome value - highlight of our Vietnam holiday! Pre-booked from Australia and paid for tour on arrival in Hanoi with no problems. Service was first class and strongly recommended. Will definitely use again.