We just returned from Vietnam and our trip to Halong Bay was fantastic. We booked thru a travel agent in Hanoi but you can book directly and probably save some money. The junk we were on was the Prince. Others include the Princess, the Red Dragon and the Lagoon Explorer. The website is www.indochina-junk.com. Take a look at their responsible cruising information too. We were blown away by the quality and artistry of the food and the staff's focus on customer satisfaction. Bring some warm clothes though! As a place to visit, Halong Bay is one of the most beautiful areas I've ever seen. We did the 3 day/2 night option and that was the perfect amount of time for us. Indochina-junks gets our top rating for sure.