Welcome to OCDO Brad.
Moving your thread to the Montana sub-forum as the questions are state specific.
As to asking a LEO about laws, that is something we never recommend. They frequently don't know or understand whereof they speak.
"Montana is a traditional open carry state. Localities are substantially preempted, but have limited power to prevent and suppress the carrying of concealed or unconcealed weapons to a public assembly, publicly owned building, park under its jurisdiction, or school, and the possession of firearms by convicted felons, adjudicated mental incompetents, illegal aliens, and minors."
Some local folks should chime in shortly and add to this.