Thanks very much for all your advice-it's really appreciated and a great help as it's our first trip to Florida! We want just 1 vehicle so I think I'll book an 8 seater as we'll only have the luggage in the vehicle coming from and going back to airport! What do you think?I've emailed Aer Lingus who we are flying with to find out about the car seat situation - I nearly sure they don't allow the car seats on board the flight which is a bit of a bummer but not to worry we'll manage!! It's the long flight we are not looking forward to with our 3 young children aged 4,2 & 1-will have to ensure we've plenty to keep them entertained!
Thanks again! Genevieve