The only real public transportation is around San Juan. There is nothing like greyhound. PR is the size of Conneticut, It's not small. You are looking at an hour and a half drive on an interstate like road to Ponce and 2.5 to RIncon. If you are stuck without a car, you can take tours, but with a group of 6, consider renting a private driver for tours. Search the forum, there are suggestions.
To come to Rincon you can call Carlos @ AnyTime/AnyPlace Taxi: (787)398-3621
The cost is about $140.00 one way for up to 10 passangers with luggage and the price includes all tolls.
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