On some of the islands (Grenada springs to mind) the local taxis are small minibuses so you will be able to share with others to reduce the cost. There tends to be set routes which are almost identical to the coach tours but you save time because there are only a few of you to get on and off at each stop and are also able to pull over for viewing points more easily. Availability isn't really a problem, it's more like trying to stop them hassling you to get in that is but even so, don't leave it too late getting off the ship. Some places have set prices displayed for different routes so that you know what it should cost you and you don't get ripped off. US Dollars are very welcome and in some places essential. Don't bother buying any local currency but take plenty of smaller denomination USD notes to avoid getting ripped off or given fakes in your change for a $50! Petty theft and scams can be a problem on some islands. You've picked the right time of year to go. Have a great time.
Hi,the answers are yes, yes,& yes! enjoy the cruise.
Hi there - i agree with the other answers, but one thing i can not stress enough is to agree a price with the driver before leaving the port.