I have a trip planned to Morocco in September, me and 3 girlfriends. We're planning on touring around with a rental car, visiting a different city almost every day: Marrakech, Meknes, Fes, Rabat and Casablanca.
I'm very curious about personal experiences of ladies here on how to dress in Morocco. I've heard that it's better to cover yourself up, even in the touristy areas, especially since we're a group of girls. I have no problem adjusting to their "dress code", but I don't exactly have a lot of things in my summer wardrobe that go below the knee or cover my arms...
Can anyone give me some advice on how to make my western-european girl wardrobe work?

Any other recommendations on where to go and what not to miss are very much appreciated too!