The bikes seem to only take 3 people including the driver. What if I have a larger group?

You’re correct. They bikes take three by law and out of consideration for space. 1 Dapper guide, 1 guest on the pillion seat, and 1 guest in the sidecar. (Tip-we know everyone wants to ride in the sidecar so consider taking turns!). We have 3 bikes so can accommodate 6 guests. In the future, the group number we can accommodate per tour will increase but for now the maximum size group we can host is 8 persons. It keeps the tour personalized which everyone loves!