If you make sure your vehicle is well looked after and serviced regularly you should only need minimal spares. Where you are going is not really remote any more. Years ago it was - but your main worry nowadays is somebody running in to you! It doesn't matter what spares you take - if something does go wrong it is certain it will be something you don't have (Murphy Rule 6B). If you have Top Cover in the RACV (or eqivalent), they will tow you, give you a rental car and put you up in accommodation. Carrying a ton of spares that take up heaps of space is not necessary unless you go to very remote areas.