Olá!
I'm back from Morocco! I took the car and I don't regret it! Next time I go there (yes! there will be definitively a second, third... time) I will take the car again. The roads are better than in Portugal, they have less traffic and there's no problem parking. I never felt unsafe or worried about the car. Whenever I wanted to park I always found a nice place with a "gardian".
The only problem with taking the car is the bureaucracy you need to face in order to get all the needed documents (territorial extension of the insurance - this was easy - and, if the car isn't in the name of the driver (brother's car, ALDs, renting, leasing,...), a letter of the owner allowing the car to go to Morocco and other people to drive it, this letter has to be also signed by an attorney and stamped by the Moroccan embassy). I managed to get all the documents in one day but I think it was a world record. In Portugal the Moroccan embassy is very efficient and receives the papers in the morning and returns them authenticated in the afternoon, it costs 10 eur each paper.
Thank you very much!
RS