I believe that the early entries are for resort guests only (people staying in a diney hotel)
There are early days though, due to season I believe....That is posted on Disneys site (under the attractions scheduals)
Good luck
Korlows
You have to present your resort ID to enter the parks early on Extra Magic Hour days. But if you want to find out which park is open early to resort guests, so you can avoid that park, check the allears site.