We had a wonderful trip through the desert around M'Hamid. We were three travellers (two women, one man) and were joined by two guides, Mohssin and Yaha. We spent 4 days in the desert and had the most amzing experience. The trek was easy to do if you're of average fitness, and we took regular brakes so that we would not exhaust too much in the sun and some strong winds. Mohssin and Yaha were the best guides, they prepared amazing food (breakfast, lunch and dinner) and accommodated to our needs (when one of us got tired we could even ride one of the camels).
We saw very different landscapes inthe desert (some open plains with rocks and a lot of plants, a dry river bed, huge sand dunes).
Regarding clothes, I would recommend to wear open trekking sandals with socks for better walking across the dunes and sand and a long traditional scarf or a sunhat and long linen or cotton clothes.
Thanks again for the great experience! We'll come back for a longer trek for sure :)