Exmouth is a coastal city in Western Australia, in the near of Coral Bay.
Hitchhiking Cape Range National Park
To get into the national park there is a "share a ride" station that is maybe a good idea. To get a camping spot inside the national park you have to be at the rangers office really early in the morning because many people would like to stay there over night. But if you have your own tent you'll find a place to sleep somewhere, the park is big. Inside the national park its really easy to catch a ride from beach to beach since there is just one road. Make sure you bring your own snorkeling gear and it'll be amazing. Check out Exmouth on the Hitchwiki Map for the spot.