Well, I think there is no better time than the next 3 weeks to kill a good buck. If it was me I would hunt the buck and forget about the freezer for a while. There is plenty of hunting season left to kill does. Another thing is that this big buck will probably be hanging out not far from the does. You might consider sitting downwind from the doe bedding area that way you may catch him checking things out early afternoon, or if he doesn't come maybe you will get a shot on a doe. It's really personal preference, but that's what I would do.