I arrive the Saturday after Thanksgiving just about every year to POR and have never been on the same route twice. It is a busy check-out day, so they are running several buses back to the resorts. Most times, the buses are not even filled.
I have not been once to OKW. A few times, it has been SSR and POFQ, but I have been on the BC/BW/YC route as well.
Sometimes, we are first and sometimes we have been last. Best just to sit back and enjoy the ride, because you are definately on your way!