Just came upon this forum while surfing for information on Chan's Tour Bus service. Really, trying to get a phone number for the NKP office, assisting a friend for his upcoming travel to NKP Thailand. In the USA now and my Thai files at our Thai residents.
Was stationed at HQ 7/13 Air Force, 1970-1972, and many TDY visits between 1974-1976. My Thai wife moved her register to our Soi Mahamitr location street before the Bambo Hut. In 1997, we returned to Udon and moved her register back to her original home address, Nakhon Phanom, where we maintain a retirement home. When in Thailand we visit Udon Thani probably about every two months and stay at the Chareon Hotel.