I am going on a carnival cruise from jacksonville in june. I'm arriving at the airport a day early and then I need to get to the cruise port the next day. Are there any hotels there offering airport / cruise port transportation? Also, do my children (ages 3, 1.5, and 6 months) need a car seat? I really don't want to lug all the car seats since we'll be carrying the smaller two on our lap on the plane.