nmf--frankly, I HOPE you make it, but I wouldn't bet any money on it. Regardless of luggage, you still have to go through immigration. Where does the ferry leave from? IF it leaves from Oyster Pond, I would say you have zero chance of making it. If by the airport, maybe. Luggage on the WEEKEND is often two hours and more to come. SOME people during the week are reporting only 30 minutes to out the door with luggage. My recommendation, carryon or not, is for you to have a backup plan in place, as I think you will need it.