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