Oye: Good advice above (all of it), and while I've never spent any time in
the Outback of Australia, like others I've spent considerable time hanging
about some of the most remote desert areas in N. America, and if you're
deep in the bush in the US or Down Under, it really doesn't matter much
if the closest town or outpost is 80 mi. or 200 mi, as either way you can
get into serious trouble if not paying attention.
EXTRA water is an absolute must. if there's 2 people going out for 2 days,
I would bring a minimum of 1 gal. per person, per day, plus another 2-3
gal. just in case it's needed.
As mentioned, everything out there either bites, sticks, stings or scratches,
so be sure to have a decent medical kit along. Bug bites, scratches
and scrapes are the most common stuff, but a blown out ankle or broken
bone requires a bit more than a bottle of antiseptic and a couple aspirin.
When it comes to hiking away from the vehicle/camp area, I've developed
my own, highly un-scientific method for A) not getting lost, and B) knowing
how to get back to my truck/camp anywhere from 1-5 miles away. Having a
disability that can cause issues at times (tendency to tip over), and by using
this same method every time I venture out anyone can easily trail/find me if
needed. I enjoy the tranquility of detecting alone out in the wilds, and can't
stand to have a "chaperone" tagging along "just in case".
It's real easy, as you simply do what I call "road loops". Drive slowly down the road
several miles ahead before you begin detecting, and take notice of the geography
on both sides of the road. After you stop, get out and have good look around, then
turn around and drive back to where you wish to begin, again taking note of the terrain.
On the [very poorly drawn] map below, you can see at the bottom of the page
where the green stripe crosses the black road. That is the "Start", or where
you will be parking your vehicle. Before you leave the car, take a compass reading
of the direction the road goes, and also of the direction/angle you are
heading off at. If the road heads North, then I'll start by going to the West side
first, and walk somewhat of a "loop", as I know I can always turn to the East
and find the main road. When I turned around during my survey of the basic
terrain I picked out a landmark on the West side, and while hiking I'll be looking
for that marker, or, after enough searching I just "take a left", and head East
back to the main road, and an easy walk back to the truck.
Next trip I'll go to the East side of the road, and make a loop again heading
North/NW. I can head West at any point and again find the main road. Since
I never get more than a mile from a main trail/road, the wife always knows that
I'm somewhere along that looping trail to one side or the other, and no further
than a mile or two from my truck at any time.
This method won't get you too far from a main trail, but so long as you have
a compass (or can navigate by Sun/Moon or stars) you'll always know how to
find your way back.