Publication Project - Astronomy

I have decided to do a book on amateur astronomy. I am not quite sure exactly what I am going to have in the book, so my plan is to interview some of the people I know through Bath Astronomers, perhaps go round and photograph their kit. It would be nice to go out on an observing session and get some shots of shifty silhouetted figures hunched over their telescopes. Won't be able to use a flash though, which could be problematic.