Oh, and on the topic of Zombie's swimming, you should never expect a waterway to be strategic unless it's fast moving or hard to cross in some other way. Most locations like this has a prison, like Alcatraz.

San Francisco is probably the easiest city to survive a Zombie apocalypse because of Alcatraz and Angel Island. You can plant crops of Angel (perhaps even use it as a summer home), live on Alcatraz (or use it as a winter home) and salvage supplies from the area surrounding. You could save on fuel by using sailboats.

The currents around Alcatraz would make it impossible for zombies to swim/walk to it, since they'd be pulled out to sea at low tide or pushed back to shore in high tide.

I, unfortunately, live on the other side of the country, so I'll probably be barricading myself into a high rise or trying to find a similar spot on the east coast. Only place I can think of over here would be up towards Canada, like the Saint Lawrence River.

Anyone know of an island with turbulent waterways around it on the east coast?