Yes, you will need a permit to enter and camp in Flinders Ranges National Park in South Australia. Visitors are required to purchase a park entry permit, which covers vehicle entry and access to the park's attractions. Additionally, if you plan to camp within the park, you will need a separate camping permit. Fees vary depending on the type of campsite you choose, such as basic bush camping or sites with more facilities. You can purchase entry and camping permits online through the South Australian National Parks and Wildlife Service website before your visit.