I just read my first issue of adventure cycling magazine and I love the idea of touring on a bike. I have a Cannondale 613 (road bike) and would love to do some weekend trips (due to lack of time and money for longer trips). A few questions for those more experienced: Why not use a backpack in stead of panniers? Why do the frames cost as much as the panniers? What type of rear frame should I put on a road bike like mine? Where do I learn more about this ? I especially loved the article on weeekend camping trips!