boat deck project

I have a small maycraft boat and want to build a deck from the seat to the rear. Any suggestions on what to make it out of. I plan on making it hinge for access to my tank.It will be supported in the front by the bottom of my cooler/type seat. I just want to be able to use all that dead space into a platform to stand up and fish. Anyhow, plywood? starboard? plywood fiberglass combo? Whats your thoughts on my winter project. Would like not to get to expensive ,but dont want it ugly either

Pics of the existing setup might be helpful.


17’ Henry O Hornet
26’ Palmer Scott

Yeah I’d like to take a look at some pics if you can get em.