I've never done this trip, But i think each vehicle as an entrance fee has to bring a bag of wood ( or 2 if they feel the burn.... oops I mean need ).
I think the central fire is the best way to do it for cooking purposes. better than having 30 small fires everywhere.... NASA will think the aliens have landed if watching from their satellites at all the flickering fires....hahaha
I would suggest bringing your own braai grid and tripod setup to make life easier for yourself.
Water, I would suggest bringing from home if possible. I'm bringing the solar shower and have a 60L water tank fitted where my sub tank should be so the wife is sorted ( sunny weather being the main factor !!! ) I will bring along 20L drinking water for coffee and nursing the babalas the next morning.....
Then the MOST IMPORTANT piece of equipment will be to remember to bring along your own personal spade...... besides for digging holes in the ground for what ever nature wishes to graciously relieve itself from the company of your body, but possibly a
separate spade for moving some hot coals to the side be able to cook on...... just saying.... use it ..... don't use it..... WWW WWW WWW