Visited the park as part of one-day tour with AAT Kings: Port Stephens Tour: Dolphin Watching, Sandboarding & Australian Reptile Park Admission (to and fro Sydney). Had about one hour for the park and it was sufficient to see the main sites and have close encounters with the animals (e.g feed the kangaroos, touch koalas, snake). Ideally to have a more enjoyable time at the park, recommend about 2-3 hours in the park.