Check out the Correctional Forum, they have a pretty accurate take on it, but remember sometimes they have a bone to pick.
I always say, in Corrections, you know who the criminals are, and the ones with the guns are on your side.
It's not for everybody, but if you can get over not being touchy-feely, and have a little tough skin, you should be ok. Always be fair and friendly and consistent. The women are supposedly the most difficult to deal with, needy. There is a lot of mental illness, so expect some of that. Also traumatic brain injury, which makes people seem "slow". Doesn't make them "bad". Sometimes they just get mixed with the wrong crowd and make bad choices.
You need to have excellent assessment skills, as you may be the only "medical" person available. LOTS of autonomy. If you want to advance, just hang around,you could be DON in a short time.
Good luck. Let us know how it turns out.