What to expect... 

After a cool beer (Tusker hahahaha), hot shower, a decent meal, then you'll want a good sleep before the real trip starts.  A decent breakfast is always available before you'll head out in whichever direction your route has been planned for; you'll be checked beforehand that you are carrying enough drinking water, but you don't need much else because the support team will carry tools, spare tubes and a first aid kit; and the support truck will have a spare bike and everything else that you might possibly need along the way.  A stop in the bush mid-morning is always welcome, when you'll be offered fruit and snacks, and more water if you need it. It's always more than adequate to sustain you through the day, some of the riding is hard work, but extremely rewarding.