The crews of A Co. 4th Avn Bn. (4th ID) were picking up their 25 UH-1Ds and flying them to Pleiku at about the time you arrived in Vung Tau. Most of us had already had a couple weeks of flying with other units while our birds made their way from Ft. Lewis by ship. We got to party a few days in Vung Tau before heading to the Highlands and the 'loss of innocence.'
Welcome Home, brother.
My first UH 1 flight was a test flight of one of those, possibly one of yours, that came by ship.
I actually experienced an auto-rotating (under no power) landing on that flight.
My company, though it was called a "transportation" company, did aircraft repair/maintenance.