You do have to be careful with attaching timber to ply. they expand at different rates when wet and will warp something terrible. It's not impossible, it depends on the type of ply, and the lay of the grain. Ensure all the solid timber is across the Ply Grain as if it is another layer on the ply.
Becareful with thos snap together flooring systems. Many of them are a composite material and turns to soggy Granola if it gets wet. There are one or two that a real timber on a ply backing and these are much better at copping with moisture. It is good to coat the rear side with Epoxy
. This seals
it all and makes it much harder and stronger. A top coat of either oil
or Polyurathane helps to seal all the joins and will keep water
I can't comment of Bamboo, I have never used it.