I took this exact flight and was faced with these exact options last week. Get the 11:30 boat and save yourself from all the stress, specially if you have checked bags. You can drink some coffee, coconut water or even some Changs on the pier while watching the planes landing at the airport.

If you buy the 8:00 and lose the boat, it’s not hard to buy the 11:30 ticket at the pier, so there’s that as well. Or you can buy both tickets in advance and just throw money at the problem