We arrive the first of December for a two week stay. We are interested in the Zoo/Xunan trip using either Tropic Air or Mayan for the transportation. We would like to hear from some who have done this or know of it. Questions I have are- do you need a minimum number of people and would certain days of the week work better. I would have liked to do the Zoo/cave tubing but, my lovely wife is worried the caves would feel too close to her. Many years ago we took a boat trip thru a cave that got low and it creeped her out. Thanks all.