(On my initial excursion to Vietnam, I was “caught” in Saigon through Tết for 3 days because most organization things to do and transport experienced shut down). In case you are limited on time, You can even choose a guided working day journey to Da Nang that begins in Hoi https://hoi-in-an82593.anchor-blog.com/18246111/detailed-notes-on-hoiinan