What's a typical RN's day like in a level 1-2 facility?

I'm a 20yr. of experience RN here in CA and live close to Sierra Conservation Prison in Jamestown. I'm seriously considering applying, but I'm fairly clueless about working in a prison. Does anyone out there work at SCC? What is a typical day like for an RN? How do they work out scheduling for weekends and holidays? Is there "mandatory" overtime - how does it work? Is it a union environment? Whew - enough questions for now. Thanks for your help...........