PS And to Sean's point, with the Pett tripod system you have nothing but the tripod if you are out of bags. With the hassock (or as Dauntless would have, a true PoP) at least in dire circumstances--out of bags--you would have a sealable container albeit with some unpleasant cleanup afterwards. Just carry plenty of extras and even a few Hefty bags as backup to the backup (sorry Jonathan Winters if you have to carry them out! Oh Sh_t now I'm really dating myself) I think we got all the straight "poop" on porta potties we're gonna need :-) Neil