I'll Show You Mine...
FEMA has backed down (sort of) from the "no guns in the FEMA trailer housing" position. From WWLTV.com
Residents can now possess and store firearms in trailer parks or other temporary housing set up for hurricane victims by the Federal Emergency Management Agency under a new policy announced Monday.
Use of weapons is still prohibited in the parks, according to FEMA spokesman Butch Kinerny.
I can only guess at FEMA's thinking here, but maybe the expectation is a resident in a temporary trailer will tell an intruder, "Go away, or I'll show you my gun!"