Well, the truck is a truly terrible idea (*under* the truck might be the best of bad alternatives). Perhaps we need to go down the "there ought to be a law" route and mandate that the owners of trailer communities provide a tornado shelters. They can't be that expensive to build.... a hole in the ground, some cinderblocks, some steel I-beams.

Here's a question for the experts. If, for some reason, you're stuck in your truck. Are you better off with the windows rolled down, partially down? Fully up?

My very superficial understanding leads me to suspect that if the windows are closed, you're risking the pressure differential exploding them. On the other hand, they will protect you from a lot of flying debris (to an extent) if they are closed. Maybe partially closed?

I guess when it's all said and done, it's EIA. If you live in a tornado prone part of the world, and you live in a trailer park, you should probably have some sort of plan worked out in advance regarding the best course of action.