Agreed. I wouldn't take the chance of cancelling and rebooking. You'll be surprized to know that Wyndham's original points system was based off of DVC's. Somewhere along the line they lost the magic of Disney. I also like DVC's wait list feature.
Depending on the time of your flight, at least you won't have to be out of your room by check out time that day.
Also, if there is any way possible to not officially check out in person I would do this. I it is on the tip of my tongue what it is called, where you don't have to stand in line and officially check out. Since we frequently book one whole extra day on our vacations because we don't leave until 5-6 in the afternoon, I don't want Wyndham or DVC having access to that room because I know that they may rent it out. I also do this in case for some reason we end up not being able to get home and need to turn back. If we had officially checked out, we would not have the option of returning back to the hotel. This worked for us once when road flooding made us decide to turn back and stay another night.