A smooth drive up: 3 1/2 hours from Adams Morgan to the Liberty State Park ferry in Jersey City. Squalls and wind on the ferry out, sunshine on the way back. A disappointingly long line for security on the island, complete with those awful GE air-spritzing machines.
I spent half an hour getting through security once on the island, then an hour wandering around the monument itself. It's impressive. Needless to say, I was alone, but I kind of liked it that way. I'm glad I went.
The ferries were slow and peaceful, and were full of schoolchildren and moms. The view of NYC from the ferry was really stunning, especially once the sun peeked through the clouds on the way back.
A smooth four hours back, except for some commuter stuff on the beltway in DC.