I booked two tours with Your Thai Guide; one of Bangkok city sights and the other out to Ayutthaya. The service and consideration of the company, and our guide Joker, made our experience so special.
Coming to Thailand during the mourning period for King Rama IX meant some of the sites were closed, free, or had different hours. Joker did a wonderful job modifying my itinerary to accommodate these closures and still make the overall experience one I won’t forget!
I would highly suggest the Ayutthaya day trip option. It was wonderful to get out of the city and see the historical sites of the old Capitol. Having an air conditioned van with cold water and cold towels between the stops really helped this American manage the Thai heat!