There are lots of collapsible 2 wheel carts made for carrying canoes out there. They should all work just fine.
I think you'll find 'biners unsatisfactory as you'll end up with a little slack in your straps. Cam straps will become your good friends. Get extras, the river snakes tend to gobble them up. Paint the buckles with a color unique to you.
Don't Wanna Die Askin' for Another Chance