If you want to jump in some cool shoes, follow the lead of Nick and get your hands on some Inov8 Talons. Late notice I know, but you might be able to pick up a pair in the city. Great combo of flats style and killer grip/traction. Weight wont be an issue for you as the 190s are as the name suggests 190gms. They will be the ideal shoe for the conditions.
Thanks Rod, I tried the F-Lites but they have a heel lift which force me to run on my toes. I'll stick with my trusty Adidas Adios, I held my feet during last years Mud Run so hopefully ok, if not i'll be slipping and sliding with Tucks at the back of the pack. Either way, all the unknown factors of trail running are adding extra excitement to this foreign adventure.