Local IC Nursing question.

I was wondering about becoming my own IC nurse. I have an extensive background in corrections and have looked into a few per diem registery jobs in my area. The money would be good, But if I can just contract myself instead of having a middle man (Agency), I am wondering if They would go for something like this. I have never done agency nursing before and really can't because I am very happy with my current job, but I am looking for something on the side. I think I can provide the same service for more then what an agency would offer and a lot less then what an agency charges. How do I go about this, I assume I just get some insurance, written contracts( and how may I find these?), and speak with an HR department. I am just wondering how sucessful you can be as an IC or do most companies choose agency nurses. What can I expect and how much sucess have some had in the past?