Hi, Angela!
Oh, fantastic! I'm soooo jealous that you'll be taking the 10-night Mexican Riviera cruise very soon. If you would like, you can just pack everything in your closet, and I'll carry all your bags for you!? Oh, well...it was a good try!
From what I understand, you will have a similar schedule as a
7-night cruise in that you'll have one formal night and one semi-formal night—formal wear for men: tuxedo or suit; for women: gown or dress; semi-formal wear for men: suit/jacket; for women: dress or pantsuit. For the rest of the evenings at dinner, it will be cruise casual which is usually pants and a collared shirt for men and a casual dress/pants and a top for women -- no shorts, jeans or t-shirts for adults. Depending on the kids' ages, you can decide how to accommodate their attire.
I hope that helps you plan. Have a wonderful day and a magical vacation. Bon voyage!
Andi