The cruise company can pick you up right in front of your hotel (if you are at one of the better riverfront hotels).
Rich ordered us the seafood dinner--lots of different Thai dishes that were good, but nothing spectacular. The prawns were a bit overdone. We saw fireworks again along the river--yeah!!!
On the way back down the river, we stopped at Wat Arun, Temple of the Dawn, and saw a light show and heard stories about some of the riverfront attractions. It was very romantic. It was a great dinner for our great honeymoon!!!
Lesson Learned: You can make reservations and some (limited )special requests via email.