First: Advanced warning is important.. A good WEATHER/ALL Hazards Radio can save your life, has saved many already.
Next is preparation: Know where the campground Shelter is. (And get ye to it)
NOTE: With Tornadoes this is not always possible. but I once laughed when taking a test because the question was:
Where is the best place to take shelter during a hurricane?
A: underground
B: Above ground (outdoors)
C: indoors
D: IN a shelter outside the storm area
I have long said the best place to be when disaster strikes is... ELSEWHERE (Option D)
Finally: The Government (NOAA) conducts weather spotter classes. Many amateur radio clubs host these classes,, They not only teach you how to spot Tornadoes and other weather situtations, but what do do when you see one coming. (or hear it).. I recommend these classes.. YOU DO NOT NEED TO BE A RADIO OPERATOR to attend.