Will you have a rental car?
OKW has great rooms & is very pretty but is also very spread out and unless you have a vehicle, you're going to want to be near the main building & themed pool. You can make requests of course, but they won't guarantee anything.
I stayed in OKW with no car a few years back, and all the bus riding to/from the parks / all around OKW before we got to our drop off and riding in wet bathing suits was no fun. Since I do not plan on driving for any of my upcoming vacations (I commute enough!) I will not be staying there again unless I have no other choice. SSR would be the better choice for me & my 2 kids.
Another minus for OKW - no elevators. If they assign you to the second floor and you have a heavy child to carry at the end of the day, or even a load of groceries, it can zap the magic from the moment in a heartbeat.