Then basic rules for desert survival are:
1) Carry as much water as you can comfortably carry. Then add some more.
2) Cover up. That means broad brimmed hat, long trousers, long sleeved shirt, sunblock and sun glasses.
3) GET OUT OF THE SUN!!! Even the locals don't go out in the mid-day sun. Take a hint.....
4) If some moron says that you ain't allowed this or that, walk away from him. Map, compass, watch, signal mirror, knife, whistle etc arn't luxurys. They are basic life support. If he gets persistant, take it that he's going to try to hurt you. So then it's him or you. So do as your spirit bids...
5) Remember that "Liability Wavier" means: We Can Do Anything We Want To You.