Last there for the High Atlas ultra a few years back.
there are safety issues travel.state.gov
seat61.com/morocco always best for me
or nice driver gruide from $50 per halfday
car marks you for scammers thieves
booking.com otel.com for hotels best for me others
visitmorocco.com many online scammers pay only with CC
or better usually ge tbest deals boots on the ground.
Have been going there since the 1960s more dodgy than
it used to be some terrist issues insuremytrip.com wise.

Good luck!

Grenada is far from Madrid but is on the way to Algeciras. I would pick up a car on leaving Madrid, stop in Grenada to see the Alhambra (remember, you must have tickets to this for the date and the hour you want to visit), and drop the car in Algeciras. With AutoEurope there is no drop off fee. The ferries from Algeciras now go into a new port called Tanger Med which is some 40kms from Tangier. I should think you could pick up a rental car there and proceed on the road to Kenitra if you want to by-pass Tangier. Last time I researched this, you could take a ferry from Tarifa (near Algeciras) right into Tangier port but don't know about today. We wanted to hop the train to Kenitra. We worked on the Navy base for a few years right before it closed, the American base. Don't know how you could get a pass onto the base today but have a contact who might know. Don't know any of today's hotels, but there is a nice one at Plage des Nations off the road to Rabat right near Bouknadel (remember that base ?). We were going to stay with a friend in Kenitra. From Kenitra I would go to Rabat before going on to Volubilis and Fez.

We are thinking of a trip to Spain and Maroc at about the same time. Have to see if I can get FF tickets. We were in Madrid last year so will be by-passing it. Going to try to fly into Malaga, take a bus to Algeciras, go over to Maroc, return to Alceciras, pick up a car, drive to Almeria province where we lived for many years, and out thru Malaga.

Hope this helps.