I've read that this excursion is no-longer possible on conventional tourist vessels. Only by longboat? Are there any smaller boats with sleeping accommodations and overnight arrangements?

Not sure if the Travel forum or perhaps the Bangkok forum for local knowledge.

MOVED

Upstream Cruise (Bangkok – Bang Pa In)

Departure: Tue, 22 July 14

Website - http://www.asian-oasis.com/cruise-special-deals-mekhala-bangkok-cruise/

This cruise is a 'luxury' cruise, aimed at the higher end market.

I've used this company before, though not for that trip.

I recommend the company, no problems for what we did.

Edited July 18, 201411 yr by David48

First time I went to Thailand I did the bus up to Ayutthaya via Bang-Pa In and the boat back down the river. I really enjoyed it.

First time I went to Thailand I did the bus up to Ayutthaya via Bang-Pa In and the boat back down the river. I really enjoyed it.

That's how I did it ... enjoyed it also.

Recommended that trip to my Sister, 5 years later ... she loved it.

What we refer to is not the trip in Post #2 ... because you asked for an 'overnight' trip.