Lesley, I am so glad you were all okay. God was really watching over you. I have hydroplaned twice, and it is the scariest thing in the world because there is nothing you can do. The car just takes off on its own. The first time I was lucky enough to spin through a median and have no damage, but the second time I ended up facing the wrong way after smashing against the guard rail. Not fun. At least my air bag didn't deploy, but that may have protected you from more injury, even if stinky and painful.
Thanks goodness it didn't derail your trip completely. That would have made it so much worse! The Grand Floridian looks wonderful.