I fairly recently purchased a camel back type water bladder. Its perfect for day hikes and tracking exercises and Ive just started making it into a survival kit, there is a decent sized pocket in the front and there is room for carry in the water bladder compartment. I have even taken it on an overnight with good success with a bedroll (tarp, blanket and poncho) attached to it. I feel that once my outdoor skills grow I will be able to use it on extended trips. I was just wondering if anyone else has used one of these for things of this nature. Here is a link to the model I bought from North Face.
http://www.geardirect.com/products/Unclassified/6591.cfm
http://www.geardirect.com/products/Unclassified/6591.cfm