If you are talking about camping gear and supplies why don't you just TOW the stuff?
You could use a kayak, a small dinghy or an inflatable.
It would give you something else to do if the wind died.
They make something called a Hydro Trailer which is designed for high speed towing behind a PWC.
Actually, you take a PWC and throw out the motor and pump and turn it into a usefull trailer :-)