C2j,
Yes, it’s Phu Quoc. Sorry for the duplication. I didn’t see your post when I did a search.
dook’s “Cambodia or Vietnam” was prescient. Phu Quoc is a large island in the Gulf of Thailand, south of the Cambodian coast. Currently Vietnamese, it is claimed by Cambodia. As a consequence, there is a large Vietnamese military presence in the north of the island.
The airport was closed a few years ago and replaced by an International airport, which now flies in 1000s of tourists. Phu Quoc has been transformed from a laid-back tropical island to a destination overrun with new resorts. Raw sewage flowing into the sea has killed a large percentage of the coral reefs, which was one for the reasons for going there!
C2j has control.