All of the boat hoisters now come with metal buckles and Harken unofficially puts the breaking point of these new buckles at 500 lbs. To lift multiple boats and gear, create a floating mezzanine and use the 200 lbs system to lift the whole platform
I've been using these incredibly lightweight dry sacks for several years. Even though the waterproof coating is on the outside of the bag, they have not leaked yet. The seam taping is done on the inside and on all my bags have never shown signs of peeling. 8/10 because of expense.