Be ready for anything but remember that just because someone is armed does not mean you have a shoot situation. Years ago I stopped a van at night for traffic and did not suspect a thing. As I got to the tinted windows I was shocked to see lots of weapons and some bad looking dudes. Turned out I stopped a alphabet type anti-drug agency van that was full of jump out guys in plain cloths. They had just badges on their necks.
Looking back on it I guess I was calm because if they were bad guys I would have been dead right there.
Here in IL only LEOs have CCW.
I carry off duty but am very concerned about being spotted. IMHO some LEOs here in IL may be quick to fire on an armed person since we have no CCW and just being armed may be seen as a lethal threat.
Anyone read in COP magazine about the blue on blue shootings? Scary shi$ there.
Edit: Just reread this. If the guy is makng attempts to hide a weapon. Its time to get gun out, seek cover, and get ready because noone who legally carries does that kind of stuff. Mentally preparing yourself to actually shoot another human being should have already been done. Read "On Killing".