After a long drive from Fez to Merzouga we reached the edge of the Sahara Desert.  From there I took an hour long ride on Sheriff, a friendly and good-natured dromedary (the correct name for a one-hump camel) out into the Erg Chebbi dunes at sunset.  Patti 4WD'd it out to our (very fancy) tent camp.

Map of our route.