Laminated plywood works fine for bow forms, I've got some and they are strong when 2 or 3 sheet thicknesses are glued then screwed together.
The only thing is that you don't want to put heat directly on them or they will start to soften up. I think the epoxy or resin they use to laminate the plywood is temp sensitive and can't take direct heat like from a heat gun.
I've bent wood on mine as long as I'm careful not to put direct heat on the form and keep the heat gun moving. So for what your talking about doing, unless you cure your glue ups in a hot curing oven you'll probably be fine with it.