I forgot - Marstroms funny looking 4 wheeled dolly for the A-Class

Drag the boat and dolly out to an anchor or mooring. Climb on the boat and sail off the dolly (the dolly floats). When you come back you can sail onto the dolly if you are real good or push the boat onto the dolly. Release the mooring line or pull up the anchor and drag the boat and dolly ashore.

I hear it works well in calm water. I have used a similiar trick myself by leaving my trax's tied to a post.