Actually I think I first heard this idea from Bill Roberts and I may have refined the idea slightly. Next time my trampoline is off, we'll be incorporating it into our 20. Basically, put a zipper pocket under the trampoline and have a small drag chute / water anchor in there with some line and a decent carabiner (you can get a weighted/sprung chute with a bridle that will pop open in the water for about $30).
just keep in mind that the drogue chute does not work with strong currents. I capsized in the RTI a few years ago in Destin Pass and my drogue chute went to the rear of the boat. Our spinnaker was caught in our rigging and we went turtle eventually snapping the mast as we were being pulled back under the bridge.
