Just so you know, in recent posts DISrs have reported that they no longer do the full 'show' at CG. The lights aren't lowered as much and the music either isn't played at all or isn't played as loudly. You now have to go out onto the observation deck -- which gets very crowded -- to see Wishes. You <i>may</i> want to rethink your CG/Wishes plan.
BTW -- The food in and of itself at CG is worth a dinner there. Even sans Wishes.
GOOD LUCK!