I would recommend transferring at Pop, AoA, or CBR. Those routes circumvent much of the traffic (and traffic lights) on Buena Vista Dr., so should be slightly faster on average.
Thanks for the replies. Do any of you know if they have taxis that wait outside the park like they do at the other parks? If so, we may go that route instead.
And yes, we have a PAP, so using up days is not an issue.