I've been at jobs with late hours and low staffing volume. If there's surveillance I wouldn't be so concerned, also if it's in a populated area, It does get scary when you're alone. and we've also got to keep in mind things do happen, like Jessica herringa for instance. I would see how they feel about having a gun on you or some kind of safety tactic, ( pepper spray, a knife, or a small bat incase you ever were concerned for your safety,

There's a TA station not to far from where I live and I always see plenty employees in the store. It also has a 24 hour restaurant next door that's always busy. I'm sure management has safety protocols in place for day and night shift. Ask them about it if you get to interview.