Here is a link to these guys blog (Henk, Colin, Mike and Robin)
Henk is the guy with the Blue Sprint and lives in Pirongia. Colin was sadly unable to go at the last minute.
Robin did all the tarseal bits as he was lugging a Harley around :)
http://www.horizonsunlimited.com/tstories/...ders/003156.php

now THAT is a GRAND CHALLENGE

finally made it to the end.  Interesting read...
Shame to keep loosing your teeth in the dirt tho :) :)
And sounds like you would want to keep alot of distance when a road train came by.