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will1602 said..
. Are there many people that do this that I'd end up meeting .........
Depends if you are William or Willhemina
anyway yes plenty do it but I second Dman's comments. You will need to factor in camping cost as if you sleep in a vehicle / tent anywhere near civilisation you will get fined. Need to stick to the actual camping areas and pay the $5 a night or whatever.
Camping at Coronation Beach in Geraldton and then a stint at Lancelin Lodge backpackers is a pretty conventional kinda trip and there will be plenty on time on water and fellow watersports travellers.