If your going out back most farmers, stockman ( the people you will be running into) wear slip on work boots of any brand,
eg
http://www.blundstone.com/
They are hard wearing, reasonably water poof and ( importantly ) easy to get on and off. Out bush blokes won't wear their work boots inside when they come in from the paddock.
Closer to bushwalking areas most folk wear ankle high hiking boots Not often will you run into wearing midcalf mil style boots.
Low boots, gaiters in wet areas, shorts even in winter ( depending where you go be aware Wearing shorts bushwalking in Winter in Tasmania will get you casevac'ed )
What may not have gotten to your part of the world is that we are having very high rainfall right now rivers are flooding towns are on stand by for evacuations Tonight!!!!
Not in Victoria tonight but if this is the weather change the're talking about keep that in mind. for later in the year.
I have a cousins wedding out west of Wannaring at Easter and I'll be in for some sh*te because I'm pretty confident I will be the only fella not wearing slip on boots ( I can't, my instep is too high to get them into a boot my size.) So I'll be wearing my Hi-tech low ankle hikers.
Don't wear sandles that will identify you as a pommy from a great distance. Thongs ( flip flops
http://tbn0.google.com/images?q=tbn...0CC596D3D269F97FD27F131800A80A55A1E4F32AD3138
are suitable after dinner in the home or to and from the shower, also very handy in the bed room or tent for pink misting spiders.
Does any of this help?
Carl