We have no minimum for most of the tours. In terms of the maximum, we work hard to achieve an average group size of 15 PAX and we will always try to keep numbers under 20.
We do our best to have multiple guides to ensure that everyone can be accommodated, but at particularly busy times of the year (public holidays, Easter weekend, etc) it is mandatory to reserve your spot online in advance to guarantee participation on your desired date.
If you are planning on joining the tour with a group larger than 6 people (same family, friends or people that already know eachother), unfortunately we cannot accomodate you. We advice you book a private, customized tour instead.