I spoke personally with two Sherrifs about this, and actually have an e-mail from my local Sherrif (Latah County) saying that there is no law about it.
Take a look at what the statutes say:
So far - all public or private schools are off limits - but it says that there are exceptions in section 18-3302D... those exceptions read:
18-3302C. PROHIBITED CONDUCT. Any person obtaining a license under the
provisions of section 18-3302, Idaho Code, shall not:
(1) Carry a concealed weapon in a courthouse, juvenile detention facility
or jail, public or private school, except as provided in subsection (4)(f) of
section 18-3302D, Idaho Code
So they basically just defined "school" as any k-12 school. A
(e) "School" means a private or public elementary or secondary school.
secondary school is a HIGH SCHOOL. University campuses are "Post-Secondary Schools"
It is legal, but most likely against school policy. I attend the U of Idaho, and CCW
there every day. If an administrator found out - I would surely be expelled.
I don't really understand why public schools are allowed to get around Idaho's preemption laws, but they do. For some reason, when it comes to carrying a firearm on campus, they act as if it were private property, and they can trespass you from the campus.