LimeSlice,
My friend was at the Isa for some time whilst her husband worked at the mines. She made some great friends whilst there and now she has moved on she often talks about going back. It might take a little adjustment but it's a great community.
Re: cancer concerns, the mines paid for blood tests to make sure there was nothing to worry about.
As for adjusting your cycles, have a look at menstration.com, there is a discussion how the moon cycles can change your cycle. It can take up to two months though. When I tried skipping AF and took a pill (can't remember the name) it didn't work, AF still arrived.

I can email you the moon cycle info if your interested. Pm for details.