You can book camping or selfcatering accommodation at Simply Scuba 011-6780972/3 or another nice place to stay is at http://www.cocorico.co.za
There was a excellent thread on Ponta a couple of months back with descriptions of the reefs and coordinates. Check under the offshore fishing thread.
Let us know how was your trip.
You are safer at Ponta than at your house anywhere in South Africa. Their law is still working. I have camped many time at the camping site. Sometimes was it only me and my wife and nothing has ever been stolen or that you feel there is a problem.
Enjoy the trip you will fall in love with the place