Describe for Traveling Mums: Whenever visiting Miami-Dade County Fair and Exposition (the Fair in Miami-Dade at Tamiami Park), any of the First Aid facilities on the premises will provide a private space for nursing moms. Just ask and they will direct you to them.
The Fair is open March 12 to April 5th Daily, so mothers can breastfeed or pump here every year during those dates.