For double handers, if it's really blowing the dogs off, everyone will be at the back of the bus anyway, so they could both clip into the mainsheet.
I get this vision of two people screaming along in the water, side by side, taking turns pushing one another down while the other comes up for air. <img src="http://www.catsailor.com/forums/images/graemlins/crazy.gif" alt="" />
I do and don't envy you all sailing in the ocean for this very reason. I've never liked the idea of being attached to the boat, especially fast boats.