We cruise out of Jacksonville quite often and have always parked at the cruise port which is convenient but also $100+ for a 5 day cruise. Looking for an alternative I found book2park online. The booking process is very simple, you are provided digital receipts for your transactions. The shuttles to and from the port were constant. The only thing I find that could be improved is maybe a little more gravel on the lot but definitely not a deal breaker I would definitely recommend this service can't beat it.