Round trip back to Fes
Pick a round trip if you fly in and out of Fes, or if Chefchaouen and the north come next. The 2-day tour is the quickest way to sleep in the dunes, at the cost of two long driving days in a row.
The 3-day Fes to Merzouga tour adds a night at the edge of the dunes and an easier rhythm. The 4-day version also breaks the drive back with a night in Midelt.