DH is a commercial airline and an air force reserve pilot. There's a fair chance that he will be flying you to WDW! He says he flies every flight like his own kids are in the back. In fact, our kids have had hundreds of hours of flight time and he wouldn't put them on a plane if he wasn't confident about their safety. When he flies, he thinks about safety, emergency scenarios, the instruments, the radio communications, the weather and the airplane.
When we drive, we think about dinner, what the kids are saying, what's on the radio...
The military spent several million dollars to train him and he has had tens of thousands of hours of flying and practicing every imaginable emergency in the air, and so has every other pilot flying every other plane up there too, including the guy next to him. Unfortunately this isn't the case with cars. How much drivers training have we all had? I'd bet that it's thousandths less that what pilots have had in a plane.
How much training has the teenager in the car next to you had? Do you think he's thinking about safety?
The chances of an accident on the road are so much greater that DH was required to take several defensive driving courses in the military because they had invested so much money training him that they didn't want to lose him on the road! He's had a grea deal of security training (I'll let you read the lines on that one) and what many people don't know are the number of agents that fly with the passengers on commercial airline pilots.
I'm a lot more afraid of being carjacked than hijacked.
Before he flies, DH or the first officer preflights the airplane inside and out. After every plane change, he writes a report about even the tiniest problem with the airplane and the mechanics check it out and repair it, if necessary, right away. Every airplane is regularly inspected by mechanics with hundreds of hours and experience.
When do you think the car in front of you on the highway was last inspected?
If you have kids, read a book out loud during take-off and landing. It will distract your thoughts. If you are flying with a spouse or friend instead, strike up a good conversation just prior to each. Take a good book and a stack of magazines and enjoy the view. Hope this all helps, and
drive safely 
!