Hi Marc
You will reach any of the three destinations within 15 mins, come rain or shine, hail or snow, day or night, taxi or rental car.
Methinks that your web-designer computer precision brain will be sorely disappointed at Tobago's ability to shatter the best laid plans and turn them all on their head, so my tip is to wait and see how you get on - there is no shortage of hire cars or taxis outside of easter/xmas etc so you shan't go without. You will quickly find that any detailed campaign plans go to seed when faced with the laid back nature of people/life, the tiring sun and your body clock telling you that it is 4 hours later in the day and demanding that you sleep!
Sometimes I wake up with a whole list of things to do - I deem the day a success if I achieved half of them. Back in the UK I was the ultimate in anal retentiveness, but have slipped into a more relaxed pace now - as visitors should as quickly as possible to enjoy the island to the max.
I know from our posts that this is a long-awaited holiday, so understand your wish to cram as much in as possible - you will do, just plan a little, not a lot, is my recommended course of action.
Feeling sleepy now - siesta is calling...tomorrow is another day
