Not much you can do with tornado in Scamp and truck. Except run at right angle from direction of travel of storm. For strong winds point front of truck and scamp into the wind. After all they travel down the road at 60 mph or so.
Living in a hurricane region I have learned that the wind does not come from the same direction with every storm. If we are expected to get winds and gusts less than 75 mph we stay put and point the truck into the wind at our sticks and bricks. There is an site to give this info based on location. If greater than 75 mph we head north and make a camping trip out of it.
Addition
Different shapes of RV handle the wind differently.
We have an Airstream and they are among the best in aerodynamics.