The small city of Douz at the gates of the Sahara where we've spent most of the week was formerly an oasis for the caravans. Nowadays most of the population is of bedouin origin. My daughter's friend used to spend his summer vacation in the desert with the whole family when he was a little boy.  His father himself was a nomad in his youth (not so long ago). 
Had to use the 75-300 a lot cause they're very proud and not too keen on being photographed.