Immigration is a simple procedure.
Note the many tearful and joyous airport reunions of returning Vietnamese meeting relatives for the first time in more than 20 years. Bikes and motorcycles are everywhere. It seems like chaos, but you have reliable guides to meet you at the airport and handle details. Overnight will be in a modest central area hotel with private facilities. The Cu Chi district outside Saigon has an amazing network of underground tunnels made famous during the Vietnam war.