I think (not sure) that it will be "open" seating the first night in the dining rooms... Hope so because if 2700 are going to eat at the Lido I will be calling room service when I get on!
Leaving at 1:30... 3-4 hours to get here... 1 hour in "parking" line, 30 min waiting on shuttle and 3 min. to get to terminal... you will be right in the middle of everything... I would suggest you plan on being in line to park no later than 4ish.. just my opinion. The area to get to parking gets really crowded as several lanes turn into 1 or 2 thru a security area. Make sure no guns in car... even with a conceal permit it gets kinda scary. Several years ago I took some relatives down to board a ship and we were in line over an hour before getting to security and then it was another 20-30 min, to get luggage out, and get me out of there. Going back to pick them up was a bit better.