First if travelling by own steam, when arriving at Marrakech airport make sure you ask what the airport fare to the Hotel is before agreeing taxi ride. The trip notes give you an idea what to pay. taxi drivers will try to take advantage.
We travelled in September and it is hot when the sun rises above the mountains, particularly at the lower altitude and as there is little shade. Make sure you have plenty of water .
Be careful what you eat the day before you start on the walk having a dodgy stomach can seriously ruin your trip.
The refuge (base camp) is fairly basic we had a room for 16 hence it may be difficult to sleep also you are up early on the two summit days .
The climb up to Toubkal is not technically difficult although the path is rough and dusty and a times is fairly steep. My opinion is that the descent is trickier as there are points which can be slippy so walking poles may assist.
Food on the trip is generally good a lot of cooked vegatables. If you like alcohol be warned the Hotel in Marrakech may be one of the few places you can order it.
Try the Italian Ice cream restaraunt about fifteen minutes from the hotel on the way to the Souks (which will take around 45 minutes to walk).