Hi ann135, and welcome to cruise-chat.com! I'm glad you're enjoying the site -- as you said, there is a lot of great information provided by many knowledgeable people.
Regarding your upcoming cruise, here are a few answers:
Celebrity's prices for drinks may be found here
. (This is certainly a rough guide given the "and up" figures.)
And, here is the lines' Guest Alcohol Policy
. So, the official word is that you may bring wine and champagne onboard (2 each) but not hard liquor.
As far as making the trip more memorable, might I suggest dining one evening in the alternative restaurant, Normandie? I usually don't recommend the cruise lines' extra-fee restaurants, yet Celebrity does a superb job with this and we felt it was worth every penny (and more) on our last two Celebrity cruises.