Damnoen Saduak Floating Market is a Tourist Trap
If you searched "things to do in Bangkok", the Damnoen Saduak Floating Market will be listed as one of the top 10 activities. After all, it's a tourist trap for a reason.
We spontaneously decided to take a trip outside of the city to visit the market on a Saturday morning, and by morning, I mean 7:30AM. Traffic starts after 10AM, according to the locals, and it's about a two hour drive, so 7-7:30AM (latest 8AM) is suggested.