In case you weren't already mortified, the islands sometimes house a population of more than 100,000 ants and can survive for more than a week without making it to dry land.
However, finding dry land is the goal, so many organizations have recommended you stay far, far away. Not only do those stings suck, the Texas A&M AgriLife Extension says the ants will move quickly onto dry objects. It recommends you don't even touch the colonies with oars. There's basically no way to sink the horror house boats, outside of dish soap, which can break up the waxy coating that allows them to float.