Cheers - perfect info there! I am sitting waiting for my ride - its already dark, so I will have to guesstimate focus...dammit! We are going to do it over the ocean, well, kind of - I am planning on pointing the camera South West to see how it goes (most of the coast around Adelaide points West). Like I said, its a trial of a trail, so I'm not going to be too peeved if it doesn't work out.
With any luck, I'll open the shutter at around 8:30 - which gives me a good 3 hours before the moon starts to rise....which reminds me, I better find my hip flask!
As for F stops, yes, I had decided to split the difference between 5.6 and 8 as a starting point.