You are the leader of the trip. You choose your companinos (alone or together with your group), setting up goals and make sure everyone gets involved, sharing your experiences with each other.
As a companino, you have to be an open minded person to be able to join a new group. Heading to the new experiences where you are not only be a part of it but also the creater of new ones. Bring the joy and value to the people in your new group, which may become your best friends in the future!