How to build a home made kayak pvc cart
Here is a one stop site for lots of kayak cart plans, videos, and how to builds.
Sit on top kayaks with self bailing holes are easy to make carts for. Just find some old axle and wheels from a big wheel, wagon, hand truck/ dolly or other and make a simple cart that sticks up through the bailing holes like this:
http://www.kayakfishingstuff.com/drupal/content/building-pvc-kayak-cart
http://www.youtube.com/watch?v=IGSXOoHBpIk
Big Balloon Kayak Wheels