Clothing/Shoes/Weather Gear: thailand is a tropical country so it can be hot and humid even in the morning. So when at the Damnoen Saduak Floating Market and Canal, it is a goof option to bring a cap or hat (or just buy one at the market so you can use it right away and be a souvnir item too) to act as a shield from the sun and also bring shades to reduce the glare from the sun. for those who are afraid of sun burn or don't want their white skin to have a tan, then bring sun block lotion or spray that you can apply to your face and neck.
Clothing/Shoes/Weather Gear: Don't forget your hats. It can get hot even it's in the morning. Especially if you are on a slow paddle boat, it will get hot. And of course sunscreen if you are wearing sleeveless, and drink plenty of water. Some boats provide straw hats for the passengers. If not, just buy a hat from the market as your souvenir from Damnoen Saduak :)