It's true that you can prep and the only requirement is cooking during the timeframe, people have even smoked goods like sausage to use in or on the main dish. Which is fine too. That takes a long time and the main dish is cooked for the TD and proven with PoL.
With that said, please still show the prep pics of the dough. I don't think I need to confuse people with an extra PoL, but don't let that stop you from showing the entire process when it starts. I mean if someone made a dough like you and didn't see the "first" PoL, that would then not be fair, even though is it, get me? LOL.
PoL is only needed in a group pic of all (most) the ingredients (which can be your finished dough), or one plating pic.
PS. JayT fixed his camera, so watch out. He makes killer pies too!