North Korea never let any foreigners into their country without...

North Korea never let any foreigners into their country without an escort, these minders take the visitors to pre-defined places, they also inspect camera's and force people to delete photos they do not approve of, so the notion that they would let a bunch of westerners travel freely and film whatever they want is completely ludicrous, it's all propaganda, intended to fool people with simple child-like minds, such as yourself.