RE: Wait a sececond, does weight matter?
There was an article a couple of years ago in Winfsuf Magazine (I think) written by Jim Drake. He gave a ratio of an increase in weight with respect to leveraged and drag. As you increased weight, leverage increased significantly more than drag, as noted in a post above. That is apparently why in some small boat sailing classes they adjust how far racers can hyke out. The bigger you are the less length. I would guess there's a formula of some sort.
Weight jackets are filled with ?. Water might work since it wouldn't weigh you down once you fell in.