The info as posted on another facebook thread was : Food Vouchers will be available for pick up at the main entrance, International Gateway or over at Innoventions West. They will allow you to get one entrée, one side and one non alcoholic beverage with no price cap at the following locations : Electric Umbrella, Sunshine Seasons, Yorkshire County Fish Shop, and Norway Bakery Kringla Bakeri. The event as you know starts at 9:30 but you can get into the park with your reservation at 7pm. However if you are already in the park on an annual pass or day ticket the dining locations will start excepting the vouchers as early as 6pm.
I came here trying to confirm this info and I've put in a request to join the page where this info appears : Eating Around the World and All Through the Land
.