Originally Posted by blaise
There is one movie where they just drop into a river and then walk along the bottom, because they obviously can't drown. But they couldn't do that in the ocean. It's not like they could have a good enough sense of direction to walk on the ocean floor and find an island.
Your biggest threat would be from other surviving humans who wanted to get on the island.
The ocean walkers would be more of a random threat.
In World War Z they mention giant herds just walking along the bottom of the ocean. If that herd randomly walked up on your island you'd be ****ed. Having a boat would help. Leave the island for a couple of days while they walk off the opposite side of the island back into the ocean.