Thanks, MStick, for asking these questions, and thanks to everyone for the thoughtful replies. I'm also considering Summit for next year, so I found this thread very helpful.
My husband and I live in Michigan and I hate flying, so we sail out of the East Coast whenever possible. So far, twice out of NYC and once out of Cape Liberty. If you leave out of Bayonne, I recommend coming in a day early and spending the night at the Wyndham Garden Hotel - Newark Airport. They have great parking deals for the entire week and the hotel is clean and nice. We've stayed there a few times and will do so again if we leave out of the East Coast next year.
Booked on Carnival Freedom, Feb. 2012 (Cozumel, Costa Rica, Panama)
NCL Gem, Sept. 2011
NCL Jewel, Feb. 2011
NCL Dawn, Sept. 2010
NCL Spirit, Feb. 2010
NCL Gem, March 2009
RCCL Explorer of the Seas, Feb. 2008
Carnival Miracle, May 2007
Carnival Conquest, April 2006
Caribbean Princess, Feb. 2005