Posted February 15th, 2018, 07:19 PM
You can taxi/Uber to South Beach and pay to store your bags at the Luggage Lounge. Spend the day on the beach, people watching, lunch, drinks, etc. Collect your bags in the afternoon and taxi/Uber to FLL.
You could head straight to FLL and pay to store your bags there - then you are free to explore the FLL area; water taxi, beach, Las Olas, etc. www.sunny.org
has lots of FLL area tourist info.
may allow all/some of your group to enjoy the facilities/pool of some of the larger hotels/resorts for $25-50+ per person depending upon availability. Tip them to store your bags.
For 11 you could rent 3 cars, put the bags in the trunk, and then go where you want for the day.