I had to wait until I had confirmation from the operators, and unfortunately they were busy travelling in Asia.
Alex LZ4AX (https://www NULL.qrz NULL.com/db/LZ4AX) and his fiancée were operating in central Vietnam as 3W3XX and 3W3DAY respectively. Operation was around IARU HF contest dates but it was more a tourist trip with a radio than a DXpedition. They nonetheless managed to log more than 1300 QSOs.
No QSL information by now, but you can contact him via homecall.