We locked our bikes to the bike rack on our car for the trip. And then we left the keys at home. And didn't realize it until we were at the beach. Oops. We called a locksmith who said those locks are impenetrable. (Hard for me to believe - what if we had lost the key? - would we have to drive around with the bikes for eternity?). So I called my neighbor back home who graciously overnighted the keys to the beach.
Since riding the bike turned into such an ordeal I had to relish this ride :)