Hi mate did this with a standerd Disco 300 Tdi the only mod was the Diff Guards get out there take it slow and even if you get stuck you should not brake any thing. Jeff
http://uk.youtube.com/watch?v=gT4DZ1tzqL0
Where was that? I've pored over maps of the Elan Valley on several occasions and not managed to find a route that isn't TRO'd or otherwise off limits (and that is interesting enough to be worth driving).