Im looking at doing some touring this summer, and I was thinking of taking my camel back and just sticking it on the rear rack so I could carry more water with me. It might not be nesasary, but I figured if I could just stick it on top of the rack, that would eliminate the problem of having it on my back (I really dont like being on a road bike with a back pack). I could probably just secure it on there with the chest strap and if I decide that water bottles are fine, I can use it to fill up the water bottles once they empty. If I decide I prefer the camel back, Im prety sure the hose is long enough to stretch so that I could still use it as if it were on my back. Im not sure if this is much of an idea, but it seems to solve both the problems of not drinking enough and having a sweaty back.