Sounds like a great trip, how long are you planning on traveling for?
Your first part of the trip will have to be road as the peninsula doesn't have much in the way of dirt.
Your best bet is over at
http://www.advrider.com/forums/forumdisplay.php?f=32A lot of Vic guys on the site will know that part of the world very well.
And I would be taking both GPS and maps. An EPIRB may not go astray depending on how remote you are going to go.