Lucky! I grew up in a Jersey suburb of Philly and always wanted to do a ride to the shore but moved away before it ever happened. I'm jealous!

65 miles without hills isn't too bad. Everyone above pretty much gave the advice I would.
-Ride your pace
-eat and drink the whole way -- drink even when you aren't thirsty
-wear sunscreen
-wear eye protection the whole time
-don't try anything "new" (this is huge)
-make sure the bike is in good shape
-pack light. You need a couple of tubes, a multi-tool, levers, and a pump/co2 thingee regardless, but really nothing else. Throw your license, a credit card, cell phone, and a $20 in a sandwich baggie and leave the rest at home.

Is this ride supported?