I had a great time in Marrakech in December 2005. You can read an article, with some tips, about my trip on my web site: http://www.vanruitenbeek.com/artmarrakech.shtml
If you go to the galleries page and click on the Morrocan flag you get all the pictures from that trip (the ones I thought good enough to put on my website I mean... )
I am sure you'll have a great time. Marrakech is a place I will go back to and I'll stay in the same place if I can.