I booked my upcoming cruise 38 days before it cruises and I paid in full. Paid $349 for first two and then $299 for 3rd person for a 4A gty. I saw a week later that the 1st and 2nd passenger rate went down to $299. I called carnival and they gave me an instant upgrade to 4D. I got upgraded 3 floors up to Empress and got assigned a room. Then a couple of days later the price went back up. So had I not seen it I probably wouldn't have gotten an upgrade because of booking so close to departure. I say look everyday at the prices and call immediatly.
Inspiration May 26, 2002
Holiday March 1, 2003 & August 21, 2003 & April 24, 2004
Sensation March 3, 2005