I am thinking of buying a hydration pack. It gets really annoying constantly taking off my back pack to get some water. I do have a few concerns however. First off I an concerned about the durabilty off these things. If I fall which tends to happen will the bag hold up or will i get soaked and loose all my water. Secondly how does it feel ridng with all that water slushing around on your back? I am currently looking at the Sette max flopack 70z. and the Camelback Octane 70oz.