Experienced cruisers, please help me. This will be our 2nd disney cruise. The first was a 3 day and I don't remember dress codes being a huge deal. We are now going on a 7 day in April with Parents, In-laws, and children. Upon reading disney's site they are suggesting shirt and tie for men at Lumiere's. Also they mention 1 night will be semi-formal and another night witll be black tie optional. What are these semi-formal and black tie optional nights? Will they happen only at Lumiere's or at the more casual restaurants. Any help would be greatly appreciated in helping me decide how much and what type of attire will be required for my 7 nights of dining. Thanks! 

