Officially boardwalk bakery opens at 7, same as BC marketplace and other QS, but I've heard on these boards that the BWbakery opens earlier in reality (I know for a fact the BC one does not). I will be staying at BWV for 5 nights starting June 17 before transferring to BCV, I guarantee I will fully explore the coffee situation, I am up way before my family, so I like to go out for coffee rather than clattering around in the room making it, so that everyone else can sleep in.
If I forget to report back, and you still haven't heard a good answer to this, I will have a complete coffee exploration completed mid-June! I wonder if Swolphin is worth investigating for early coffee. I usually get a refillable mug, but I don't mind paying for it if there is a shop at Swolphin open earlier than other options.