I honestly think a Whaling Ship would be the best possible place to hide. If you can secure the ship it is your best bet. Get far enough out to shore to avoid swimming zombies. You will need a few suplies other then defensive suplies first. Those being fishing equipment, gardening equipment, vegetable seeds of your choosing, and a distilation system. Then convert the ship's deck into a garden for food, and set up the distilation system processing the salt water into drinkable water. Then you have food, and water and even a varied diet (fish and vegetables). Now you ask why a whaling ship? The reason being if it is a zombie world it may be one with zombie animals. You cant rule that out. If this is the case you would want a good defense against zombie whales. However if it is a zombie animal world it does throw out your varied diet as fish will be zombified too. A military ship like a destroyer would be great too but probably harder to obtain.