Cockle Creek Rd
In between catamaran and cockle creek. This is a south as you can go for free and camp.
We stayed here on the marker overnight and had the hole beach to ourselves. It has only enough room for 1 campsite.
on the way here once you get to recherche you will find many campsites all the way to cockle creek. I have marked pretty much central of the campsites, not sure how many sites there are something like 30 - 50 sites combined in about 6 campgrounds.
To access the rest of the area you need a National parks acces sticker. If you coming from the mainland try and buy it on the Spirit of Tasmainia for a large discount.