Hello again Auzzie,
Some really great points have been made here, and I love the learning curve as usual... As for the tandem Drogues, that would all depend on conditions BUT they can easily become tangled (just like two fishing lines often due without outriggers) and I have never tried it. If off of a lee shore in a big blow the chute looks to have the advantages! I guess that is why I have been carrying both. I have always been lucky, and have nothing compared to the miles of the Pardeys, and many others. I love the idea of using fenders instead of hauling an extra large float! I strongly suggest the trip line, as I have a friend who failed to rig one, and have listened to his story of that misadventure too many times.
Both take up a bit of room, and you can run off with something you tie to for resistance and warp out plain line even, but you can't magically whip up a parachute at sea... I am rethinking a few things myself!!!