It seems all overnight tours depart from Hanoi in the morning. Are there any ovenight tours that start from Hanoi around noon or later, and return to Hanoi the following night? Or, if I find my own transportation to Halong Bay, are there any overnight cruises that start just before sunset? I would like to spend a morning in Hanoi before leaving for Halong. Alternatively, I could go to Halong on a day tour, but most people seem to recommend the overnight experience on the bay, because the time on the water on the day tour is brief. As a second alternative, I could find my own transportation to Halong in the evening, overnight in Halong, and then try to take a 6- or 8-hour cruise the next day.