Yeah I'm with what everyone has said already basically. I choose the back or belly side for the form based on what will be easier. I'd rather have clamps or hose running up the fade area on a normal riser, or across the back on a forward riser. Basically whichever side has a more complex shape gets the clamps or hose.
The only exception are for things like a bamboo backing. It's much easier to have the clamps or hose press onto the bamboo than have the bamboo directly against the form because it's rounded and has nodes.
Also if I'm making limbs with alot of reflex or something I will often have the back facing the form so that I can put a protective strip over the belly side so the belly lam doesn't fail in tension while clamping down.
These are obviously not relevant problems to glass bow building, just wood lam bows.