I want to explain several points.
1: Movement from Airport to HOTEL: HOTEL of car is waiting with HOYA name card. (no pay any to driver.)
2: Money exchange, I suspect they should exchange as minimum as possible in Ho chi minh airport. (Bangkok is not good rate.), if they need, maybe Mr. Prasert or Mr. Anuwat or Higuchi can exchange. That is better for your staffs.
3: Check in, as usual.
4: Pick up them on 6:30AM at infront of HOTEL.