St. John trunk bay beach getaway & snorkel

Has anyone done this Carnival excursion? As a newbie to St. Thomas/St. John, I think I'd prefer to do a ship-sponsored excursion. The duration is listed as 4.5 hours and it doesn't start until 1:30, meaning that it ends right at 6:00, when the ship is supposed to be leaving. This sounds a bit off to me.

Are we better off just going to St. John's / Trunk Bay on our own? Do ferries run pretty regularly?

Being the experienced cruiser (and I'm saying that tongue-in-cheek), with 2 cruises to my husband's 0, I'm trying to really look like I know what I'm doing! LOL

Never mind and SORRY! I think I'm just going to visit Sapphire (or Coki) on my own . . .

Thanks!

Deb ... See you have changed your mind.

Just saying the excursion you were considering though the ship is a good one.

No worries about getting back with ship's excursions. :)

Thanks, Ocruisers!

I'm having a really hard time making up my mind . . .