I think kayak dolly are gaining in popularity, and with good reason. We are often working or "Tinkering" with our kayaks. These allow us to do so without having to work stooped or bent over. Alot of paddlers make these from PVC, or as you see in this photo plain 'ole wood works well. Some are even made so they will fold up flat. After paddling, you can use them to put your kayak on and dry it off before loading it on the family sedan.

Thanks Ted for the photo.