Evangelist's. Usually there is one person in a small group of people who travel around the country that does the preaching. The other people in the group are support people, perhaps a pianist, a singer or singers, etc. There have been some might men of God who have followed this ministry and led many to Jesus Christ. Sometimes they are called Missionary preachers.
You can call it anything you would call any other group of people. Gay men aren't like animals, they don't travel in herds or flocks, it's just a group of people.
Caravan!
A Floatilla
Infantryinfantry
Globetrotters
A group of people call the socs.
a crescental
pee
A group, crowd,
blassyem
The audience.
Genocide