On Great Stirrup Cay the beverage package works! There are three complimentary food locations on the island, Jumbey Beach Grill, Abaco Taco, and Tropic Like Its Hot.
If you splurge and pay for an on island spa treatment at the on island Mandara spa, you will also get access to the Silver Cove area which is normally reserved for those who have booked a Silver Cove Cabin or Villa. There you can go to the Silver Cove buffet which has some better offerings. you will also have access to the Moet bar, which is free if you have the upgraded drinks package, or a small upcharge if you don't. FYI there is a lovely outdoor hot tub at the spa you can use too.