Being Film #9 in Hail Horror 5. Thanks to Sean at Spectacular Views for the recommendation.
What they find is Plum Island, seemingly a perfect to wait out a zombie apocalypse. Unfortunately, this particular island has a good old fashioned Irish blood feud between the Muldoons and the O'Flynns. In the beginning of the film we learn that Old Man O'Flynn was kicked off the island because it was his belief that the family and friends coming back to life on the island couldn't be saved, and that a shot to the head was an act of mercy. Shamus Muldoon and his clan think otherwise, believing that if they can get the zombies to eat something other than human flesh, there's a chance they can be saved. O'Flynn's daughter Janet is in agreement, so exile it is until he meets up with the soldiers and comes back to settle the score.
SURVIVAL OF THE DEAD, Romero's sixth investigation into the world of the living dead, brings us back to the beginning of the outbreak, and is a sequel of sorts to 2007's awkward DIARY OF THE DEAD, a point of view movie about a group of college film students who are there at the onset of the reawakening of the dead. Deciding to use the event as fodder for a film they're creating, one sequence has them coming up against a group of soldiers turned thieves, out to save themselves and find someplace safe. SURVIVAL is the story of those soldiers, where they go, and what they find.
A world with just slightly more zombies than our own.