kayak shoulder harness

[sasha]

Here is the deal. I go kayaking alone most of the time. At some places I need to walk up or down stairs or places where wheels just don't work. Till now I would always carry the kayak. But with the lengh of the S14 its not easy. The worst part is when I got about a gallon of water in there at the end of the day.. I hurt my shoulder when this one gallon keeped moving forward 7ft and then back 7ft.
I'm going to make a harness that goes around the kayak and then I can carry it over my shoulder(shoulder bag style). So now instead of holding the kayak in the middle the harness would have about 4-5ft between two points. Has any one made anything like that??? If you did I would like to see pics and some hints on how to make it right the first time..