Pursuant to CRS 18-12-105.5, the prohibition against carry in schools only applies on school grounds/school property. To wit:

" A person commits a class 6 felony if such person knowingly and unlawfully and without legal authority carries, brings, or has in such person's possession a deadly weapon as defined in section 18-1-901 (3)(e) in or on the real estate and all improvements erected thereon of any public or private elementary, middle, junior high, high, or vocational school or any public or private college, university, or seminary"

From what I'm reading, if it's not on school grounds, the statute doesn't apply. Other prohibitions might, depending on the venue.

Caveat: I am not a lawyer, and it couldn't hurt to ask one.