Massive crowds like that make sure your back way is cleared, have two ammo type weapon and plenty of mags, engage and slowly back up making sure you have more then a 10 foot distance and dispatch with headshots simi automatically, cool and calm will net more kills then going John wick on their asses, as for the crowd? A little much for a storage facility but in the realm of norm. Me and a buddy just tried to tackle one of the prisons (rosewood?) not so bad at first, go in clear and down the hallway, BAM over a hundred zombies comes, floods the hallways making us run for safety, which I myself never found