Cambodia's silks and hand-loomed cotton are also quite beautiful. Many of the silver shops and some hotels have sarong-length pieces of cloth for sale. Individual travel to Angkor is not practical now. And because of U.S. government restrictions, it is not possible to make travel arrangements through a U.S. travel agent. Some firms based in Canada, Japan and Thailand do organize package tours, however, and you must deal directly with them for reservations for the Cambodia and Vietnam portions of the trip.
American tourists can visit Thailand for two weeks without a visa.
Tour organizers will make arrangements for Vietnamese and Cambodian visas, but it takes some time. They will need passport information from you about two months in advance. The dry months from November to March are best for a short visit. No immunizations are required for travel to this area, though that can change. Check with the county health department for the latest information from the World Health Organization.