John, my personal opinion about trailers is that I wouldn't have one if they 
gave me one.  Here in New Orleans, even if the weather isn't too bad, they 
often advise those living in trailers to evacuate even if the only problem 
is high winds.  So unless wind is not an issue in your area, there is a more 
than 50-50 chance that your antennas would get blown down even if you 
sustained no other damage.  I realize every kind of home has its problems, 
but I believe that trailers no matter how well anchored down they are are 
not safe.
Harvey