Chupa-chups with the stem cut in half will fit inside a helmet. (My cure for microsleeping.)
Find the Suzuki dealers who can service the bike (or tires) and chat with them before you need them. (Finding tires for my Postie--the most popular bike in aus--was luck of the draw as it was..)
Freecamping or Cardcamping? OSMAnd~ (Android--offline maps that can highlight fuel & etc as well), findacamp.com.au, and a CAMPS7 book were my references for campsites. Paper maps at roadhouses are also a thing... Most States' National Parks have absolute PITA "book this very remote campsite on the Internet!", so make other arrangements.
The longest between fuelstops on the A1 was Sandfire to Roeburn (320km?)-- but always have the headwind contingency on the longer stretches. A bike with a 400km tank--maybe take another 5 litres at that point.
Doing this during the Wet Season? You'll need lots of water too. And sun protection (no exposed skin anywhere--I had a pillow case as a scarf to protect the back of my neck below the helmet). I wore a Dryrider Climate Control 3 Mesh Nylon breeze-through jacket and a "UPF50+" long-sleeve shirt underneath-- the two together did evaporative cooling well. Short 'sneaker-style' riding boots (shoes?). Kevlar jeans. Suncream for parts of the face.
Telstra. Only Telstra.
(My latest ride on a scooter from Newcastle<->Adelaide is written up here.. http://scootercommunity.com.au/forums/p/22851/172242.aspx#172242 )