Yes, you'll find most hotel room reservations are refundable if you cancel before the accommodation's cancellation deadline, which often is within 24-48 hours of check in. If your reservation is non-refundable, it might still be possible to cancel it and receive a refund within 24 hours of your booking. Add your dates and click on "Search", then you can filter by "fully refundable" to get the top deals on offer near Great Barrier Reef Marine Park.