I have located and made a deal on a Poke boat Vagabond; unfortunately it is located in Florida and I will need to pick it up next time I am there.  It raises my canoe weight for portaging to 46 pounds, but still lighter than a lot of watercraft.  In the meantime I am still working on the towable floating cooler plan.  When I get it put together I'll share photos and how well it works.