The WA and SA teams have an undoubted advantage .To me this is fair enough as they have to travel.My choice is Geelong and Kardinia Park, I totally agree with this article from 'The Roar' from 2015 https://www.theroar.com.au/2015/04/11/kardinia-park-the-biggest-advantge-in-the-afl/
But how can Kardinia park be a bigger advantage than having the MCG as a home ground? Both play interstate and Geelong have to travel to Melbourne like Melbourne clubs have to travel to Geelong. Unless they're very special