(I typically wait till the end of September or early October before I put my fall plots in and I am in middle Georgia. I always hate to terminate something if the deer are still using it, as well)
Some options?:
I am assuming you don't have roundup ready beans, but you can spray it all now, with glyphosate, and wait 3 weeks and then till it up. It makes the tilling so much easier with dead roots in the ground, that have lost all their moisture. You'll have to work it up again before planting, but waiting to the end of September to plant, puts a weed killing frost on your side, for anything that wants to germinate after you plant.
You could just go ahead and spray 1/2 now, leaving some standing beans and weeds to keep the deer hanging around, and do the above.
You could do nothing now, wait till you see the leaves yellow, spread your seed and fertilizer, then bush hog everything over top (I am assuming you will have lots of biomass), which will cover the seeds, CNC's throw and mow method.