Pack for every type of weather condition in the mountains. Although our group did the trip in themiddle of August, we had rain, hail, thunderstorms, wind and sunshine all in one day! Take waterproofs, gloves, hats, thermals, layers...
The terrain on the mountain is generally fine on the first day, but on the summit day there is a lot of climbing over rocks/boulders followed by a lot of scree. Walking poles were certainly useful on the scree.
The quality of the gite and the mountain refuge was good - better than expected in fact - though ear plugs are advisable as you sleep around 4 to a room in the gite and as many as 16 to a room in the refuge. Take some form of entertainment too as there is nothing to do otherwise! One of our group had a pack of cards which kept us amused for hours!
As a Muslim country, alcohol is not readily available and indeed the hotel we stayed in in Marrakech did not serve any and frankly, after the exertions on the mountain, a beer would have been most welcome!
Do explore the souks of Marrakech, though preferably not alone, as it is very easy to get lost!