Paul @PaulPGlasziou
Not sure I have had a true “campfire” session but the guitar club have had two get togethers at the beach so far this summer. The first was covered in this Michael and Guitar Club Campfire/Jam - #31 by MAT1953 post. Not many off the list but some, but generally based on what chord sheets people had. We were taking requests at the end from passers by without chord sheets and somebody would say something like this it is in the key of G only three chords and first chord is G - now that is a challenge for a beginner like me.
The second time we had been sent about a dozen Beatles chord sheets so worked through those and near the end a passer by asked if she could sing along and she looked through peoples chord sheets and chose some songs. I think she is actually going to come along to the club purely as a singer.
I think the range of songs had a lot to do with the age group that came along with a lot of songs from 60’s to 80’s.
Not sure if the above is helpful but there is my experience so far.
Michael