My friend and I are going to visit Vietnam, Laos and Cambodia to see the world's heritage sites of Halong Bay, Angkor Wat and Luang Prabang. This is a trip around the orbit of Indochina. I'm from Vietnam, my girl friend from Thailand. Could you help us to customize the suitable trip to this wonderful region? Whether we need visa to Cambodia and Laos?
If you give a bit more information people can help you better.
What time of the year are you going? How much time do you have? What is your budget? and so on.
Visa for both countries can be obtained at the border if you use the major bordercrossings. Especially if you're thai and vietnamese citizens.