Hi Jodie, I checked Disney's online calendar and the Extra Magic Hours are posted for your travel dates. Here are the Extra Magic Hours available for your stay:
Magic Kingdom:
May 26th - midnight -2:00 a.m.
May 30th - 8:00-9:00 a.m.
May 31st - 11:00 p.m.-1:00 a.m.
Epcot:
May 28th - 9:00-11:00 p.m.
May 31st - 8:00-9:00 a.m.
Disney's Hollywood Studios:
May 27th - 10:00 p.m.-midnight
May 29th - 8:00-9:00 a.m.
Disney's Animal Kingdom:
May 27th - 7:00-8:00 a.m.
I included the hyperlink for each park so you can check the calendars again as you get closer to your vacation dates. I hope this information helps with your daily planning! Diane