There is no security at Fort Hood as far as closed gates go. It is wide open. Any Joe Blow can drive through base. They have litterally dozens of entrances that military and civilians alike can just drive through at free will.
This is odd here in Jersey Ft Monmouth has been closed up tight since 9/11. It used to be an open base where local civilians could drive through, but not anymore....It is a tenth of the size of that base...