Book a two bedroom and studio at your home resort as soon as you are able. Then at 7 months out, see if you can change. You will fewer points at OKW for the GV than a GV at other resorts, so you don't want points that you will have to borrow and not be able to put them back into the use year.
Mid-May might be easier than late May. But if you are looking at Mother's Day, that could be harder to get.