Camera cases are great; they are “expected.”
Can carry 4 spare hi-caps, a good LED flashlight, spare battery for the cellphone, my lawyer's number programmed into the cellphone, a good MLT sandwich, a bottle of Browne's celery tonic, and a calligraphic writing of the phrase “John has a long mustache.”
Remember, bring nothing where the calibre starts with less than a 4 !
All just kidding...... of course......
Be well.
My active shooter ba... I mean, my camera bag will likewise hold the things I need for any contingency.