Over packing is not critical to consider if you are merely getting to point B from point A and plan on staying at point B. I am a 60+ SSG female whom retired after 30 plus years in 2013 with a 90% disability with the VA [70% with the military]. I still would carry as much as I could if it was a one-way trip. I was a Combat Medic and then a Heavy Wheeled Driver at Ft. Carson in the Army Reserves. While I would pack light if I were merely exercising or the threat was temporary but if your “bug out location” was some distance away weight would be balanced with how long it would take to get where you were going on your one-way trip away from danger vs what supplies you had where you were going. I suppose one could build a two-wheeled rickshaw type equipment to carry the heavier load. Or if you were using a bike or recumbent trike then you could carry far heavier loads if needed, esp. if you had a motor on the bicycle. It’s all in what you are preparing for i.e. known or unknown general crisis events.