Duplicate content and robots.txt file help

I am putting together a golf website in Australia that enables users to browse courses a number of different ways and I’m a bit concerned about duplicate content and being penalized for it.
Currently every course is tagged with the region that it is in, every course is in a category of the number of holes that it is and I have also set up a custom taxonomy of State to which every course is also in its own state. Make sense?

So users can click on the ’18 holes’ category and view the list of 18 hole courses, they can also click on the state of ‘Victoria’ and view these courses or they can view a region within Victoria. This will obviously bring up some of the same courses 3 times.

Is this going to be a duplicate content problem and should I be setting up a robots.txt file accordingly?
Thanks

The site is at http://publicaccessgolf.com.au