Maybe I should sign up for it. I did my first century of the season just last week, the NYC Century. That's an easy ride because you really can't crank it up in a lot of places. My only concern is the cost. That $50 for the ferry is a lot, although my wife and I do the trip at least once each summer for the beach.

I'd do the full 100 since the only way I get to do rides like that are on organized rides as I'll reserve the entire day for it.