I fly out of Miami monthly having to drive over from across alligator alley. You'd think I'd be able to find the airport by now without gps, but I can't. If you're visiting Miami, I assume you're using GPS in the car or on your phone? It works pretty well for me to just filter to avoid toll roads.
Side note, I just spent a month traveling around Europe, opting to drive instead of taking trains. Between the speed cameras and toll roads, I've paid over $1k billed directly to my cc from SIXT, Florida tolls aren't all that bad