Great North Walk Tunks Ridge Alternative

Greetings
We are planning a four day hike from Sydney to Cowan along the Great North Walk. One of the camping areas, which would be day three, is Tunks Ridge, however, it is closed. Does anyone know of an alternative where we could stay on third night?
Thanks
We are planning a four day hike from Sydney to Cowan along the Great North Walk. One of the camping areas, which would be day three, is Tunks Ridge, however, it is closed. Does anyone know of an alternative where we could stay on third night?
Thanks