terry, have you tried contacting 1-888-Carnival and asking a representative the cost?
I would highly suggest doing the LA tour. There is plenty to see and do. We toured LA on our own with a rental car. We didn't have to be back to LAX until around 10:30 p.m. for our red eye home. You have more than enough time. Think of it as a mini vacation after your cruise is over.
Good luck.
A'ndrea
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