Hi Michael, feel your pain as I live about 8k from Sydney CBD. What's helped me a bit is to use some sort of shroud like what the early photographers used to do in the ye olde days. That way it'll also cut down on incidental light ruining your night or dark adapted vision. A large dark towel or something like that should suffice. But as Scott says, at the end of the day best observing is going to be out of the way of built up areas in a nice dark sky site
