I work part-time on the campus of a private college here in AZ. We have no carry laws on school grounds, but by AZ laws that means k-12. Our public colleges and universities have a no firearms policy, but the private sector can do what they want.
I am a big believer in living under authority, so I made sure my department head and the academic dean were okay with my carry. I have never had a problem. Now all I need to do is get the dean of students to quit being irrational and remove the language in the student handbook prohibiting students from carrying.