Every year why not purcase a custom canvas cover and frame. While initally a large expense it is a one time layout and it won't take very long to break even with the yearly cost of shrink wrap and it's associated costs. With a nice form fitted cover you can easily unzip the door to acess the boat, don't have disposal costs, and is enviromental friendly material coming from a plant and not an oil well.

In new England contact Fairclough Sailmakers in New Haven Conn. They have been building the things for longer than I can remember. Easy to install and safe on awlgrip hulls. They gave different styles available.