Each destination has it's own modes of transportation. If you choose a resort that is in a hotel district such as Cancun, you'll find it easier to use taxi service (https://www.booking.com/taxi/index.html?aid=8079361)or book activities (https://www.booking.com/attractions/index.html?aid=8079361)that include hotel pickup and drop-off. This would be the best option over renting a car. Driving in countries you are unfamiliar with comes with risks and it is not suggested. If you pick a Florida city such as Fort Lauderdale or Miami, you can rent electric bikes, electric scooters, or use ride share services to get around. Renting a car (https://www.booking.com/cars/index.html?aid=8079361)in Florida is ideal if you'd like to visit a natural spring, theme park, or take a day trip to another city. You'll be able to find links to suggested transportation within a particular city's section and blog posts.