Random point - You might want to check you can still get from Morocco to Algeria, or the other way around. Last time I looked all the border points were closed, not sure why or whether that's still the case...!
I can't really provide you with any useful information myself, but you should check out...
Horizons Unlimited and their Forums The Hubb
Adventure Motorcycling Handbook - The Adventure Motorcycling Bible (Well, pretty much...)