I recently made the goal of completing the GR20. It is a 15 day, 110 mile hike across the Island of Corsica in summer 2012 (so far away, but this summer is booked!). Last May, I hiked a few days on the South Island of New Zealand around Queenstown, but I was fairly unprepared. I'm looking to be ready this time around. I've already started some casual training to get back in shape and I'm starting to look for some shorter and more local (US) trips to help prepare(so far I'm thinking Zion National Park because it's so close to Vegas and Vegas is so easy to fly to). So, I'm wondering what other adventure travel you guys have gone on and what items were indispensable on your journey. What you did to prepare. And where I should go to work my way up to a 15 day journey. Also, I need a new backpack. Ideas?