If you choose a program with the night under the stars included, you are already half way to become a Real Bedouin !!! :)) 

Sleeping under the stars will give you the full experience, on how bedouin used to live and still do today. You will be far from the camp and the light, which will allow you to enjoy the desert, the surroundings even more. 

After the last site you will go directly to the cave or the spot your guide will choose for the night. 
He will settle the place and he will start to prepare the dinner.