My family has 11 hours in Miami before our flight leaves. Where do we go to store luggage and see the city

My family has 11 hours in Miami before our flight leaves. Where do we go to store luggage and see the city?
In early December, my family will be taking a cruise that ends at the Miami port. We get off the ship at 8 a.m. but our flight doesn't leave until 7 p.m. My wife and I are traveling with our sons, who are 1 and 4. It's difficult enough traveling with a baby, but now I have to figure out what to do with our luggage while we try to explore Miami. Does anyone have any recommendations? We're traveling on a budget, so cost-effective suggestions would be appreciated. Thanks so much in advance!
Miami - 2 Answers
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1 :
i believe that there are luggage storage lockers at port miami.your situations is a common one with all of the cruises in miami.
2 :
i would rent a cheap car stick luggage in trunk and drive around coconut grove and miami beach.