I've got a trampoline bag that I strap to the boat but I don't like it a whole lot because it's cumbersome, shifty, and a little more prone to entanglement than I imagine a pocket built into (and placed well) the trampoline would be. Although, grommets in the tramp would make attachment easier. However, I've got to restitch the trampoline anyway to repair weather degraded stitching and figured I would look for some ideas while I've got it off the boat.