The 1"x8" plank axle was light, but I added a 2"x2" underneath for rigidity.
By using the oars for the handles I can minimze cost and clutter.
And the longer the boat the longer the oars so the boat is still against my back for better braking down hill
Helpers can push from the back on deep sand or up a slight hill. Now that the kids are getting bigger they can help more and more.
The handles need to be about as long as a set of oars anyway.
The flat of most oars have slots that the straps fit through for a tight square-strap connection.
My first try, without handles, allowed the board to flip if the tires hit a bump.
I have rolled the rig under the boat in the water to avoid sliding the boat up a muddy shoreline.
I'll try to find a better picture.
And yes I want dibs on the new term "Raft-shaw