Integrity Interview?

I'm a BSN new grad that's interviewing for a position with the DOC next week. My dream is to be an ER nurse, but hospital jobs are hard to come by in my area and I don't mind an adventure before I commit to a specialty. I've been reading through some posts, but I was hoping some experienced correctional nurses could answer some questions for me!

They scheduled me for an Integrity Interview next week. It's with the background investigation dept, which makes me think it's more likely a polygraph test than a traditional interview. Any tips on making this go more smoothly?

I know there are mixed feelings on new grads starting in corrections, but if I get this position, I'm committed on making it work for a year or two. What would be the best type of facility to go to for the best experience? I was aiming for the main facility that does all intakes and admissions, but was told a large, more rural facility might have something to offer too.

Finally, has anyone ever had problems getting out of correctional nursing when the time came? I've heard some hospitals don't consider it acute care experience, or think that's where all the "bad nurses" go.

I'd love to hear your success (or cautionary!) stories.