Out of curiosity, I was looking at availibility on the 10 day cruises.... The one I am on (6/6) seems to be the least booked, or at least have the largest range of cabins available. I know that the price of a cat 12 gty has increased 100$ for my trip since i booked about 6 weeks ago. I also know that for a cat 11 (the only cat i think still available on all date) there is about a 1000-1500$ price discrepency.
oh and if you want to get an idea of excursions: there are 118, the avg adult price (not including excursions over 300$) is about $121.00. There are 48 that have lunch included and there are 48 (not the same set) that have limited places.
oh and the most expensive one was originally priced at 1500.00 but now has been re-priced as TBA.