The trip to Ayuthaya and back is definitely worthwhile! I was there last November and it was wonderful -- but -- the traffic in Bangkok itself is horrendous. It is difficult to describe. Sometimes it can take 2 hours to cover one hundred meters!!! Always, always leave at least twice or three times as much time as you think that you will need. This is not my experience alone, I have heard the same story from everyone that has visited there.

One possible alternative is to go by road and return by boat. There are plenty of organized tours that do this. They are available in all of the hotels.

Have fun! Debby - Israel