Stuff that might be nice to have

Terra Nova Superlight Voyager 2009
http://www.uttingsoutdoors.co.uk/ £279

ThermaRest
Original £67 or Traillight £30

Headlamp
One with red leds for efficient night time Navigation

Camera gear
Canon EF 24mm f1.4L USM II
Review, Review, Buy
Canon EF 70-200 f4L IS USM
Review, Review, Buy