14"-16" flat wrecking bars are available at home improvement stores, look for the "Wunderbar" or some such. They are flat and meant more for prying than anything, but they would be good for the vending machines, prying open building doors, locks, car doors, busting windows if needed, fending off dogs or two legged varmints if you don't go with the walking stick, etc. They weigh about a pound or less and should fit in your pack without taking up too much space.