Wow! That's great. I always love to travel via a cruise with kids.
Though I am not travelling this season, I have tips for you. If you are travelling on a cruise with family, especially kids then there is no match of Caribbean Princess, Carnival Panorama and Disney Fantasy.
These cruises have a number of activity areas and fun places for kids. You can find any of these cruises with your travel destination from here https://greatesttraveler.com/cruise/. Similarly, MSC Seaside could also be a good option if you XD Cinema, aqua parks and want to explore different cultures.
Withal, if you are your husband and planning to send kids to their grandparents' home for a small-time then why it is not a good idea to attend boat parties? I think mothers must get some extra time with partners occasionally.
In this regard, just book cruise party tickets from here and have great fun with your husband and friends there. Especially Moms from Miami must avail this opportunity. Luckily, such parties typically end in 3 hours. So, you wouldn't have to ignore your kids a lot.