I live in NE Florida(Palm Coast), just 120 miles or so north of Disney. In florida there are about 45 different species of snakes, but only about 6 of these species are deadly.
I know here in North Eastern Florida(Palm Coast, just about 120 miles north of Diseny so the snakes here are no different then Orlando) there are a couple of deadly snakes that are common, Diamondback Rattle Snakes, Water Moccasins, and Southern Copperheads.
Snakes are no big deal, most of the time if you leave them alone, they'll leave you alone. Snakes are so common in Florida that most hunters etc. when walking through fields with high grass, they must wear special boots.