A disappointing shoot in terms of outcomes although the positive side is that I feel I learned from it:
1. Framing and focussing are so much more difficult in the dark (no surprises there I guess), pay more attention to getting it right.
2. Shots from a higher elevation seem to work better - more light bouncing off of the river, rather then being blocked out by the boat.
3. The obvious solution to getting a decent exposure would seem to be longer timings, but this only works if the water is dead still. I ended up with lots of shots where the background looked fine but the boat looked awful. Neet to rely more on ISO and wider aperture.
4. It is surprising just how quickly the moon moves across the sky when you want to capture an image of something in a thin beam of moonlight.
5. I need to learn how to despeckle. Though will this have the effect of blurring the edges?
6. Sods law says that as soon as the tripod is up, clouds will cover the moon. Nothing for this except to try again another day.

Looks good to me.