Ron....taking your advice to heart. Only difference is, I'm on the hook for all the deposits (I know, just smack me on the side of the head, now). It's entirely family, though. So, I can haunt them the rest of their lives if they dont' pony up and repay me. And, if things go sideways, I can always cancel their reservations if they don't pay by the Oct drop dead date to get my "loaned" deposit back on their portion of the cruise.
As far as shore excursions, flying to FLL, airport to ship transfers, it's up to them. I got them reserved on the ship, the rest is up to them.
Speaking of airport to ship transfers, I've never used Carnival's transfer service. What is it? A bus? Can you book it at the airport (like other ground transportation)? Do you have to book in advance?