We have a group of about 20 (max of 20) that are traveling to San Pedro, but flying into Cancun. The group is multiple families with children and budget is a concern. We would prefer to have a shuttle or transportation service take us to the dock in Chetumal from our pick-up location in Cancun (or Playa del Carmen). With a group this size, it seems that we should be able to arrange an affordable private shuttle instead of the ADO bus. Does anyone have experience with this or suggestions of a service to use? I'm also open to other suggestions. Thanks.