I was just about to reserve my SuperShuttle online from John Wayne Airport to the Anaheim Marriott, but wasn't quite ready to pre-pay. If I don't reserve ahead, do I call when I arrive, or is there a kiosk where I present myself - as there is for Mears at MCO? My daughter is arriving the following day, and I hope she can pay with a credit card if I don't reserve her shuttle in advance.