In a few years several friends and I plan to tackle the Appalachian trail. Each year I go hiking with my family, so I have some level of experience, and all of my friends and I plan to begin training immediately. However, it is a rather large step from hiking a couple of trails a day to spending every day hiking. I have not yet gone backpacking, which is something else we plan to tackle before attempting the entire trail. What books can I read/websites can I visit to learn everything I can so that my friends and I can be as safe and prepared as possible? Also, any advice you can give here would be hugely welcome. Thanks!