We did the 3D/2N cruise in Feb. of this year. We used indochina-junk company on the Prince IV. It carried 8 pax and was the highlight of our 5 tours in Vietnam. The cruise was continuous with no returning to shore and no transferring of boats. The service was outstanding as was the food. I don't know what we paid since it was in a package tour from Waterbuffalo tours. The website
www.indochina-junk.com does not show a Prince IV but that is what we were on. I think maybe a local tour company might get a better price than you can get individually.