I saw a tent/bivy on a webpage the other day that instead of collapsable tent poles to go over it, it had what looked like a bicycle inertube type blow-up thing that kept the netting up. Would something like this help with keeping the netting up in a hammock? And where would you find something like that or would you have to make your own? I guess you could sew in a half round sleeve into the netting on both ends and slide the blow-up thing into them, then blow them up to get it tight. Any thoughts? Pros? Cons?