It's been two years so it wouldn't help you, and I have to go soon, but part of it:
* Many people left South Vietnam before the fall of Saigon through Australian and American aid, but not all were able to be transported in time
* The remainding people, if they could afford it, would pay for as many family members as possible to be transported out in other ways
* 1970s boat people - terrible experiences at sea, boats were flimsy and overcrowded, people often got thirsty and hungry and had no possessions, journey could last two weeks to six months, many boats capsized before making it to their destination (e.g. Malaysia, Thailand, Indonesia, Hong Kong)
* Refugee camps - overcrowded due to mass number of migrants, unsanitary, some had bad experiences (some people reported being maltreated, beaten etc at some Thai refugee camps), people might stay there anywhere from a few months to a few years
* Often met with discrimination. e.g. Italian migrants were often called 'dagos' (different migrant group, but that was in our textbooks).
Not really sure about varying experiences, we researched it privately for our midcourse and that's pretty much a short version of what I found.