Marc, the best way to find a group of like-minded Astro people is to advertise!
I live in a tiny country town of only 250 people and I advertised in the local newsletter for anyone interested in Astronomy.
On the first night we had 12 turn up!!!!!! You would be suprised at the amount of people like yourself.
We now have over 30 members which come from all parts of the state of Victoria. Some make the 2+ hour drive to the club night every month!
You don't have to formalise as a 'club' or 'society', you can just be a group of observers, but give yourselves a name to get insurance (which is really cheap for Astro groups at an Insurance company in South Australia, and you'll need it).
If you want any further info, please ask.
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