Glad to hear transport worked out but sorry about your problems organizing your group. I know you had a lot of problems leading up to the cruise and don’t envy you having to organize that many. Fortunately I have only had a maximum of 6 at a time and even that is difficult enough at times. Sometimes it is just best to let everyone do their own thing and meet up for dinner!
I agree July in the Caribbean can be brutal, we cut short our last trip to the east side in July because of the heat - it is so draining, but disappointing when you are only visiting somewhere for a short time.
I think I probably warned you about cell service and cash during your planning and it sounds like you tried to advise your group but some people don’t/wont listen, but it is worth pointing this out and emphasizing to @beshears so thanks for the reminder.