Links to SB 254 and its companion bill HB 1421 in the comments — they go even beyond what I've highlighted here, and you need to read every word.
Please, please, please, do not take your trans kids to Florida.
This legislation literally means that the State of Florida can assume custody of your child while you're on a family Disney adventure, keep them indefinitely, and deprive them of the critical medical care they depend on.
Do not risk it.
Cancel the vacation.
Lose the deposit.
Disappoint the other family members who are going to be there.
Stay home and be bored.
That is way better than having this be the last trip you and your precious child take together.