In my furniture building days I did a lot of staple method to pin parts together and keep them from moving. It works great and is very easy. The main reason I don't like it is that you're leaving a tiny piece of steel in the wood which doesn't sit right with me. These days I generally don't pin or dowel wings since I can just clamp them true with a caul for the actual glue up and not worry about it. For me, the pinning adds steps and doesn't add value. But if I did want to pin them for mockup purposes or any other reason, I'd probably get one of those self centering dowel jigs @Gilmourisgod has mentioned and use that with wood dowels.