Correct Naclav although I guess the last clue gave it away. It is indeed Errachidia in Morocco. My former company operated some charter flights there in 2007. Its busiest time, hence my clue, is during the Paris-Dakar Rally, and whereas I am not 100% familiar with that event, one of the stages used to be from Errachidia to Ouarzazate.
You have contol Naclav.