start feeding now. they need it for the brood they are raising and they need the new bees for winter. it takes time for them to cure what they store. i don't know when your winter starts, but unless you are anticipating a strong fall flow in your area, you'll need the time to get them fed up. + you can't let them sit dry until a fall flow starts. at this point, i wouldn't worry about getting stuff drawn out except what's needed for storing to get them through winter.