Depending on how many of you are going to SW, the taxi may be less expensive. Since it is just DH and myself, we take the Mears bus over at $18 pp plus tip for round trip. We call the night before, find out their pick up times, select a time and the van or bus is there the next morning in front of the resort. Then you call around 1-2 hours before you want to leave, they give you the return times, book it and the bus/van is in a designated area.
DH was not feeling so good one year and had to leave SW. He had some kind of a 24 hour virus and we took a cab back and it was $50 plus tip for the two of us.
Been using Mears for a long time and never had a problem. You may have to stop at another one or two resorts though so it may not be the fastest vs a taxi.