Wing walk ply question.

My plans don't give a lot of detail about my wing walk but it's for a truss
rib mostly wood wing. The walk is supposed to go from the front spar to the
trailing edge and should be 1/4 ply. my question is will a piece of 1/4 ply
bend around the curvature of the wing (Clark Y) or should I laminate, say,
two pieces of 1/8 ply? If I were to laminate, what would the best way of
ensuring i got decent contact between the top and bottom surfaces?