Apskip, again, please remember that our "sighting" in Saigon is for MAY 21, not the 24-35. There is no evidence for Saigon at any other time, and the sighting on May 21 may or may not be our race. Perhaps you could reconsider those dates?
If there is an extended pitstop in Chiang Mai, then the dates in Hue fit perfectly without Saigon on the 24-25.
And also again, there is no evidence for Hanoi other than geographic proximity--no sightings, no photos, no clues, no blogs...