User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-6050823-20141017204827/@comment-22748142-20141018103120

1 logical explaination is that the warehouse was build far from the town centre, may be close to the wall in case the defender need extra munitions  , that was how Gojumajiosu managed to steal gunpowders without disturbing most of the town , as for how the original dragonator stuck on his back , i don't know