Let me re-word this so that I can make it more clear.
US passport holder arriving into Bangkok later this month and staying in Bangkok for two full months in an Airbnb.
If I want to take a quick trip to Chiang Mai or Pattaya for a couple of days DURING that two months in Bangkok, and stay in a hotel in Chiang Mai or Pattaya, do I keep having to ensure a TM30 is filled out every time?