We had granola bars and fruit in the room and headed straight for WWoHP, which is what I assume you'll do. We made a reservation for breakfast at the latest time (around 10, I think) in the 3 Broomsticks, and that worked perfectly. The portions are not so big that you'll make it all the way to dinner though. Likely you'll need an early dinner or afternoon snack.
Sorry, I know that does not answer the question you asked, but thought I'd make the suggestion.