Jenr - We are from Northern NJ - Parsippany. Don't worry about being seasick. So many on these boards have said they had been sick on other cruises, but not on Disney. The ship is huge and the stablizers really do their job!
We had a mid-ship outside cabin on Deck 7. Never felt the ship move in our cabin. Felt it a little in Parrot Cay one night and in the theatre one night. On the way out of dinner one night I looked out the window and saw the ocean going by at a pretty quick clip! I told my husband, "Maybe I shouldn't be looking at that!" But, really, we all did fine!
Good luck and enjoy!