IMHO, all these opinions are well and good but the original poster only asked about Florida's current seatbelt/car seat law. Not what you would or wouldn't do.
I did like the idea, though, of bringing one of those small booster seats that can fit in a bag....
Both my DD's 2 and 5 are in carseats/boosters, but our last vacation this past December, I didn't bring the booster (based on Florida's law) and I did regret it because the seatbelt didn't fit right and she couldn't even see out the window! At home, we have the built in child seats in our vans. That's why I'm considering bringing one of those small booster seats next November when she's 6...but if I chose not to bring one again, I certainly won't think I'm a bad mother, if it's within the law.
I do think forcing a 6 - 8 year old who hasn't been in a car seat for some time to be in one again would be tough!
Disney4us2002, please don't feel bad if you don't bring a booster seat. Just be sure about the law. I already told you what I think the law is based on my research with many websites. You do what you feel is best, not what other mother's feel is best.
I remember the days when you could all hop in the back of a station wagon with no seat belts!
Also, I was just thinking about this Sunday after watching this movie called "Once Around" with Richard Dryfuss and Molly Hunter?? Anyway, they were rich and rode in limo all the time. Their infant was on her lap! I said to my husband, you don't need a carseat in a limo?? Then he proceeded to list all the places you don't: Buses of all kinds like shuttle buses, school buses, in the back of RV, taxi's, and trains etc...I'm not saying this is right or good, it's just ironic to me that we think kids should be in a booster seat till 8 yet in so many other modes of transportation they don't need anything! Fruit for thought.