I work 11pm-7am and have for years. I normally stay awake in the mornings and go to sleep about 2:00pm everyday (even on my days off). I've found that at WDW I still get sleepy around 2:00pm every day and still wake up wanting to eat my dinner about 2:00am (no matter, what time I go to bed or eat dinner down there). Any other people work night shift and have the same problem?