Welcome to AC.
Stevo, in our office we simply enter the family past medical history in the PMHx window. I add to it during the patient visit when I have either made a new dx or when they see more for a hospital followup.
We don't use the scheduler in AC, rather a stand alone practice management system for billing and scheduling. To answer your question about patients being checked in, I don't know if AC will indicate they have been checked in per se.
However when I'm in my back office waiting for a patient, my staff either pages my back office phone to tell me such, or I refresh my AC inbox to see if new chart has been made. That's essentially how we use AC to determine that a patient is checked in, my staff pulls the chart, adds CC:, and vitals, then forwards to my in-box.