You won't need a car or a four wheel drive in Bastimentos. Here's why: the roads are non-existent.
The main town on Bastimentos is called Old Bank, and it consists of a narrow concrete walkway which forms the main thoroughfare through town.
As you can see from the picture on the left, a traffic jam in Old Bank consists of a kid's bike left on the sidewalk, or more often a sleeping dog or two.
There are no vehicles at all there other than bicycles, and life moves to a slower rhythm. You can't possibly hurry along that walkway, you have to amble at a Caribbean pace, smiling and greeting others as you pass, walking in time to the beat of a laid back Bob Marley tune playing from the window of one of the nearby houses.
How else can you get around?
Around the Bocas del Toro archipelago most transport is by boat, and water taxis abound. In Bastimentos you could go to the main town dock and jump on a water taxi and have him take you to Roots Restaurant at the other end of town for a buck. Or across to Bocas for two or three dollars.
Water taxis are plentiful, cheap and fun. Just hold up a hand, and a boat will pick you up pretty quickly and take you wherever you need to go.
There is a (sort of) set price system, but this is the Caribbean, so haggle, especially if you are a family or larger group of people. It's all part of the fun, and most of the boat drivers enjoy the game too.
Roads on Bastimentos? Non-existent.
A car on Bastimentos? Not a chance! Now that's Caribbean lifestyle.