the self-standing units are the way to go - I bought one from REI that is designed to be hung from a cord. The top and bottom inflates to provide support. This unit _stinks_! If someone wants to try it out and see if they have better luck than I did, it's yours for free  The biggest problem with it, firstly, is that you have to find a good place to hang it up. Since it's designed to be hung from the center, it's difficult to get it far enough out on a limb from a tree ... assuming there is a tree. In places like Quilomene, that might not be a possibility! Secondly, once it is hung up, the wind blows it around something awful. So standing inside nekkid trying to shower is, let's just say, less than optimal. Avoid!
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