This depends on the size of your group. We recommend a larger group for any tours with long bus journeys, as it is much more comfortable in a full sized bus than in a 12-15 seater van or a 19-21 seater Mercedes Sprinter. In the event you have a smaller group, we would use either a van or Sprinter, but always leaving a few spare seats to allow for some extra space and making more stops along the way to stretch legs/use bathrooms.