There is a lot of hokie information about the FEMA camps. Do you know if there is a .gov site that discloses information about them? I found information about Region X at FEMA's site, but do you know where there is legitimate documentation about others?
But it's pretty hard to hide stuff from local residents. That's where much info comes from and not all are tin-foily hat folks who also see the "Grays" get out of their little ships! Some of these sightings come from some very credible military folks and ex-spooks. Heck there is a fully reinvigorated POW camp in Anniston Alabama. It's located at the Military Police School, but a lot of college ROTC units use it for training. The camp was first used during WWII, but got a funding boost in the 1980's to be brought back up standards as a training site. Dual use? Maybe.