If you have them only in a Deep box at the moment, it would be highly reccomended that you give them a second deep to work on as well. In your area the bees are probably going to need about 70 lb of honey or more to winter correctly. Just about the best way to allow them to get this is to add a second deep body and let them fill it out. It may require you to feed them good, but that's just part of getting them ready for next year at this point. Treat this colony just as you would if it were a shaken swarm from a box of bees. Once the 1st deep is 80% filled with drawn comb, add a second box after breaking up the brood nest with the undrawn frames, and feed if needed.