I stripped my islander 4 years ago and used high end cabinet plywood. Gave it two coatings of epoxy and wrapped it in marine carpet. For a fishing boat I would advise against the carpet and opt for the white plastic 4x8 sheets. If I had to do it again I think I'd talk to a sheet metal shop and have them knock up a metal floor and just rivet it down, then cover it with whatever. Mine is still holding strong the way it is and cost was under $1,000. Best of luck and check your transom for rot while you got it stripped.