I wouldn't worry too much about the navigation, unless there is a serious sandstorm, you will have plenty of tracks to guide you to some extent. Its not as hard as it sounds, honest!
Re Al: I'll Pm you his details.
Dreaming of Dakar
Everyone has a max speed, 90% of that max speed is much safer and easier, and if that 90% speed isn't fast enough at Dakar, you enter the snowball. - neduro