As a DM, if a character with a backpack told me they had a pickaxe, a turf cutter, a sledgehammer, a cloak bag, iron rations, in addition to rope, armor, weapons and rations, I would call B.S. immediately. Because that isn't how backpacks don't work. If you ask a modern soldier how overloaded he or she is, you'd be shocked and not bit surprised at how fast they take chances and dump that crap to get other things done. Soldiers, time immemorial, are savvy and sneaky.