Hay poddymullet,
I've taken the boat over and camped heaps of times. South of Tangas is where I normally camp .
Its quiet and not to many people camp down that end good for kids . There are no facilities at all so you would need to take water etc.
Just past Cowan heading north there's a few good spots as well one has a fresh water creek right beside.
These camps are right on the beach to keep an eye on the boat.
Hope this helps mate