Whew, Good Luck.
My family was there for Thanksgiving 2001. Annual Passholders, etc, etc. Called PS for the 50's Prime Time Cafe. Were told we were the earliest ones to book, blah, blah, blah. Requested an area large enough for 18. Was told on the phone, "no problem, you will all sit together." However, when we got there, 30 minutes early to make sure, we were told we would be seated as per PS arrangements as in regard to time; however, we would be placed at 5 different tables in 4 different locations in the restaurant. DW went ballistic, I went ballistic. Manager informed us that CS is NOT allowed to guarantee such things as seating arrangements, only the time and the number of guests. DW, normally quiet and reserved let her feelings known, and other guests started complaining as they also had ressies for large parties. Manager was able to rearrange things so we could all sit in the same area (if you know the restaurant, you understand) albeit, 45 minutes after our "guaranteed time" and all ended well. Moral is...on Disney property, you will be assured of a time and number in your party, but that is about it.
Good Luck,
Glenn and Janet