Is it just me or has Nine Tails been recruiting a SHIT TON lately? Every bunker I go to has about a gazillion guys pouring out of it. Makes for a hell of a gunfight, but I GOTTA assume this one is a bug. Anyone else running into this?
You can even the odds by taking a Nova tank down into the bunker. The overwhelming firepower should even the odds.
If you can't fit one on the elevator, do what @Blind Owl does and take a Stevetank instead. It's almost as effective and the NPCs still stand no chance no matter how many there are.