This is a hosted stay through Hipcamp, below is the information provided by the Host regarding their offering.
Love Litchfield National Park, but hate the online booking hassle? You aren't alone. As the operators of Litchfield Cafe and Wangi Falls Cafe, they regularly see the park's online system declare campgrounds "full" only for beautiful sites to sit empty all night. To help travelers bypass the system and save money, Litchfield Campground offers a hassle-free alternative. If you are fully self-contained, they invite you to stay.
Their property features approximately 60 spacious RV spots in a large, open-plan layout. No winding tracks or difficult manoeuvres; they are located right off the main road, all sites drive through. The campground is an open clearing visible from the road, offering easy navigation but limited privacy and shade.