I'm in Bangkok now and have been for the past week. The floods did not affect the south of bangkok. All the places you want to see and visit were not affected. The weather is perfect and its a nice place to be. See the grand palace and emerald Budha. The price was 400 Baht per person plus we spent another 400 Baht for a guide for the four of us. The guide was well worth it. Also see Wat Po, Pat Pong, and Kho San Road. Bangkok is a lot of fun and there is no reason to put it off.