From 8:00 - 10:00 pm there were cookies, brownies, etc + milk, wine, liquors. By 10:01, the table was empty.
So if you stay for any of the late night park activities, you probably will not make it back for these items.
A "dinner"/snack is served from 5:00 - 7:00 + pop, wine, juice boxes.
But you bring up a good point, the concierge service really should last until 10:30 if not 11:00.