We took the ferry from Oyster Pond, it's about a 45 minute run. We booked a return day pass at Coco's (next to Pineapple Pete's in Simpsons Bay) and got a bit of a discount. I think we paid $89 per person, and that included a rental car while on St. Bart's. Having done the rental car thing, wouldn't recommend it. Better to take a taxi tour of the island, you will enjoy it more. Shell Beach in Gustavia is a good beach to go to, although we didn't make it to that one so can't say what's there. We landed at Gouveneur Beach; nice beach but no chair rentals or eateries that we could see.