Just thought I'd add my bit to this thread as I was actually on the trip.
As Tim mentioned, only two of the riders did all the pistes. I was the least experienced off-road with very little time spent off-road but Tim knew this beforehand. I opted to miss out the Tinerhir loop after careful consideration: it was going to be a long day off tarmac and the weather was suspect for the day. I felt I probably made the right decision. Up until that point I had done all but one piste, including the desert section which I admit I found tough. After this, I would like to think I would have ridden through the Picos with Tim & Ian had it not been for my being taken out by a moped.
DavidHale & TimCullis made some good points: it's not allways possible for riders to go out and practice off-road riding.
Instead I spent time trying to improve my fitness level. Much off this was done on my mountain bike, (which incidentally also seemed to help with riding on-piste, especially when descending on rocky patches). As I said, Tim, who had ridden most of the sections before knew of my inexperience but reckoned I'd be alright. Had I known the conditions, I possibly wouldn't have gone. As it turns out he was right. Most of my problems were probably down to lack of confidence in my own ability. I fell over a few times in gravel and rocks when "someone" persuaded me to take the wrong route- not my idea Tim, nice photo by the way!
I also fell over quite a bit in deep sand. On none of these times did I hurt myself or cause any great damage to the bike. I feel that I have a sense of acheivement from the trip despite the fact my hand is still bandaged up after me undergoing surgery upon my return to Glasgow.
Some of you can bang on about needing years of off-road experience before undergoing such a trip abroad. I don't agree. I think that at least some off-road experience would be an idea and a good level of fitness but after what happened to me, I would thoroughly recommend you get some kind of recovery deal for your bike in the event of an accident. Leaving Morocco without your bike is not easy.
I received a lot of help and got the bike into the hands of shipping agents. Only then was I allowed out of the country.
A pity Tim has received some bad follow-up feed-back about accomodation. Mabye there's more to it. Personally I would have been willing to throw down the tent if need be.
On a positive note, I saw some amazing sites, met some great people and achieved things on a bike I didn't know I was capable of.
I'll maybe post one or two pics when I get the films back from the lab. You guys with your fangled digital cameras....