We took 2 public buses today from Kanchanaburi to Ayuthaya. Had to transfer in Suphanburi. I was the only white person at the bus station. Pretty sure we got ripped off on the 2nd bus, paying 80 baht each (almost $3) but we think the normal rate is 40. Anyway we are learning Thai and Tessa can pass as one, so pretty soon we should be able to order tickets and get the locals price!
We're having a great time, have our own room at a hostel for 250 baht (less than $10) and will rent bicycles to explore the city tomorrow.