We stayed at the big 4 park just out of town in Port Douglas for 7 nights. After the fast pace of the Daintree trip, we needed to chill for a week. We had a great site right near the pool, huge and easy to reverse into (site 32).
The park has a water park, pool with slides, playground, jumping pillow, room to ride your bikes and a large camp kitchen area.
This was a great place to base yourself in the area to explore.