I'm trying to send money to a Work Ethic Camp in McCook Nebraska through western union. How do I get the inmate the ref# or do they even need it?

Western Union may or may not be the money transfer solution for that facility. If they are, you will need the inmate's ID number and the city and state code for the facility. You might try calling the facility and ask to speak with the case manager, counselor or unit team secretary to get that specific information.