In case you didn't read on the travel reports, we returned to Portugal safe and sound, already planning the next trip back
about what to take, well books have been writen on this subject , 2 I strongly recommend is "Sahara overland" from our own moderator Chris Scott, and the other is "Vehicle dependent expedition guide" from Tom Sheppard.
Best advice I can give is to try and take the minimum possible, I know is difficult , but try to avoid the "this might be usefull" syndrome.
In my particular case I took 2 boxes with spares for the car, the only thing I used was a new set of spark plugs that I always carry with me anyway, but then again I was travelling just with my wife, if I had another car travelling with me probably I wouln't had taken so much.
The only thing I really miss was lip balm, when we arrived at Merzouga after week in the pistes our lips where really dry and painfull.
Have a good journey