Wow that looked bad, but glad everyone is ok! You should ask them for the speed limit sign you hit as a token of remembrance.
What made you hydroplane? We got poured on yesterday, I assume you guys got some of the same. I know my rear tires were all over the place, but that's because they are practically slicks with how low in tread they are.
Good luck with insurance also. All the stuff you have has got to be worth more than what they will want you to buy it back assuming it's totaled.