RockyRoad wrote:

Interestingly they both had a pair
of fixed wheels sticking up in the air behind the cockpit. I imagine
that they are some sort of transport system for when on land.

My guess would be that the wheels were simply a stern hauler portage
cart that they had inverted and left attached to the stern. A
peddle-kayak probably weighs enough to merit the use of a portage
cart.