There are two Moroccan desert dunes look, Erg Chebbi and Erg chigaga. Volkswagen is the former route, drove to Merzouga, with the group into. (My lesson: to Merzouga, Do not go off-road) I personally feel Erg chigaga closer to the Sahara dunes, more primitive, but the road is also far. Their four-wheel drive can be directly entered the dunes, you can take your own tent, you can see the wild animals. By comparison Erg Chebbi sand dunes redder, commercialization severe, see wildlife, such as running a large antelope.