We will fly into Bangkok in early June and take bus or fly to Siem Reap and would like to take the boat to PP. Most of the people on here tell about a boat PP to Siem Reap. Can you go either way -- or do tides or water ways prevent going from SR to PP? We plan to go from PP to Saigon and then by train up toward Hanoi. Is it difficult to get from PP to SAigon overland? How do you do it? Train, Bus? Thanks for any information or help with this trip.