Didn't think so - so getting out and putting it in the trunk would be a no-go unless you did it before getting on-property.
Correct.
After reading http://iga.in.gov/static-documents/2...OMH.CCH001.pdf, I don't see a provision stating that a person would violate the law by exposing the firearm while securing it. What are you going to do stop along the road, put it in the trunk, then procede to the school?