Jeep Rentals on Vieques

Here is a list of Car and Jeep rentals, scooter rentals and bicycles for rent in Vieques, PR. There is also Vieques Trail Ride, where you can go horse riding in Vieques. It might not qualify as 'transportation' anymore, but will give an idea of what it used to be like :)
Whatever your choice of rental vehicle, make sure to rent it in advance! - especially during holiday season