If you have a bit of time and plan to make the best of the end of summer, head down to Meroo National Park. This is hands down the best walk-in, no fuss camp site I've been to in Australia. Since it's free with no bookings required you can just grab a tent and set off. Take your snorkle gear along because the water is crystal clear and full of rays and sand sharks. Then end the day around a campfire with a cold beer. Perfection.