The Skyway bridge doesn't bother me, there's enough structure around you to take away the height issue. My "*** clencher" is the Harry Nice bridge on MD 301 that crosses the Potomac. It's high and very narrow with Jersey walls between the travel portion of the road and the edge. It's not so bad in a car, but in the RV, which is basically a bus, the mirrors get awful close to passing semis.
We live in central Florida too, on a lake. There's alligators out back as well as one or two in the drainage ponds in the development. I'm not worried about them as they don't mess with you if you don't mess with them. They become problems when people feed them. Then they lose their natural fear of humans.