Don't think that you absolutely need to have the stuff in the locker; don't make the mistake of thinking the stuff in your locker a requirement. You're only required to keep breathing, everything else is frosting. Put together a small EDC that you carry always -- think small and discreet. If you can safely and quickly get to your locker go for it, but breathing is #1.
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Better is the Enemy of Good Enough.
Okay, what’s your point??