Nope. Complete ripoff IMO. Crappy long tail, stop for a picture with a snake, hand out for 200 Thb, back in boat, stop to meet more relatives for a "cool refreshing drink", more hands out, then finally some crappy old buildings by thecside of a canal selling the same old tat available on Sukhumvit. 1 or 2 old dears in their canoes come up to you, buy something from them by all means if you must go, but there are much better things to do with your time!
If you are into water try fishing, google Bungsamran, just outside BKK, amazing fishing for Mekong catfish, the average we caught was 30lbs!

my best Xmas present - ever......