I think it would be wiser to first figure out how to fold the frame,
and only then start working on the skin, since the skin will have
to go on & of the frame.

here are all my sof links,
I'm sure you'll learn something from them :

http://home.pacifier.com/~qayaq/index.htm

http://home.pacifier.com/~qayaq/Kayak%20Replicas%20Greenland.htm

www.imaginelan.com/aleut/./polyester_skinning.html

http://www.pouchboats.com

http://www.pouchboats.com/building.html

http://mind.dreamhost.com/kayak/

http://mind.dreamhost.com/kayak/build.html

http://rtpnet.org/~robroy/baidarka/slideshow/node-o08.html

http://elwood.gpi.uni-kiel.de/Kayak/

http://www.arctickayaks.com/plans.htm

http://elwood.gpi.uni-kiel.de/baidarka/index.html

http://robroy.totalsports.net/baidarka/

http://elwood.gpi.uni-kiel.de/Kayak/index.html