In reply to rodw:
Just got back from 2 and half week trip out there,working,there is lots of snow some of the best ski touring/mountaineering conditions in years, snow line to about 300 meters above Sidi Charramouche, mules so far,then porters,snow all the way to the summit of Toubkal. I would tentativley suggest given the amount of snow that is there at the moment,then you should have snow when you go in April. Just keep an eye on the forecast and see whats happening out there,and yes the normal route is a walk ,poles and axe,however there are other routes to the summit that may offer you more of a challenge if required.
check out pic's on alpinerob.com
have a great time