Thanks for the responses guys, I really appreciate them!

I had a look on Superior Engineering's site but I couldn't find anything bolt-on for a wagon that won't foul the auxiliary tank, I think I will go with the ATOC option if possible, if I am a bit strapped for time, I'm sure the Superior weld-on ones will do the job - watching the weight and only taking the essentials should minimise any extra strain on the towers and chassis.

MudrunnerTD, GUs with a 4.2 are really hard to find over here! All our GUIV Patrols are 3.0L and the only 4.2L we have are GUIIIs with only an automatic transmission :P

Thanks Kallen, I think it is about that, or slightly higher. I reckon that'd be a good idea, no need taking anything extra, anything you'd recommend that's particularly useful?

Threedogs, thanks that would be awesome if you could - sounds like he had a pretty epic trip himself!

Keep an eye out for a trip blog in a couple years time!