Just wondering what everyone uses for weighting down there pack when hiking during the summer. Right now I use my sleeping bag with 40 lbs of weights and then 2.5 gallons of water. I just use this because it is what I have right now. Anyone use anything that is better? Salt? Sand? Rice? Love to hear your ideas. Also do you do lower weight like 40 lbs for a longer distance or heavier weight 70+ lbs for shorter distances?