I've been as a navigator before and loved it, and I'm building my Stylus with this event in mind, every year is a different localtion in Europe, and this year it starts near Bordeaux and heads through the Pyrennes and then through the mountains of northern Spain, into Portugal and back up to Santiago in France. 5 day event, will cost you around £1000 - £1200 for everything, great value as it's fully martialed and well organised.
Anyway, for more info look here, as it's almost full already:
http://www.guildofmotorendurance.co.uk/
You know you want to





Jasper