When I went last summer we organised a transfer before we arrived. We were offered a fixed price for the journey and the driver even kindly stopped off at the supermarket so we could stock up (for no extra fee!).
I would definitely recommend Radwan – he also took us on a great day trip into the Atlas mountains. If you email [email protected] and ask for Radwan they should be able to give you a price estimate for the transfer. Enjoy your trip!