foldable river dory

hiya all,
any input on a concept i am working on right now, i would like to build a foldable river dory in the 17 to 18' loa.
i am thinking of using a solid ply wood floor that possibly folds down the center.
with pvc inflatable raft fabric on the sides, possibly a double ender, no transom- easier to set up i think.
seats would create the spread at the gunwales and the rocker required.
either alum. or laminated wood structure to stretch the fabric over- the fabric would be glued to the bottom at the chines.

intended use. relatively flat water/ flowing rivers, but no major white water.
but will need to carry a good load.
1 500 lbs!!!
i dont mind if it takes a little while to set up, as it wont be happening on a daily basis.
http://www.raysriverdories.com/WoodyhindmanSpecs.html.
check these out- same beam, bit more loa
any ideas and input will be truly appreciated
regards
wayne