Well.
A fine to do, and no mistake.
As a member of Housewives' Choice, who are playing the Fools festival later this summer, the idea of playing without PA is risible.
If you wanted a three hour drum solo, that is what you would get!
With poor old Baz trying to scream over it.
I'm with Alan on this one.
With over 30 years either gigging, or doing sound at dances and festivals, sympathetic PA (or sound re-inforcement) is absolutely essential.
The PA contingent always bear the brunt of the very few unhappy punters.
The stories I could tell.....
Being told off for someone not hearing the melodeon plyer, when said musician was at the bar, the tune being led by soprano sax in Bb (no melodeon needed)....go figure!!

Yes, of course, bad engineers produce bad sound, but in my experience, PA crews on the folk scene are far more talented and amenable to requirements than thir compatriots on the Rock Scene.

As for a "No PA" fesival...

It would have to be a small one.

And no Drummer!!!!

Regards Ralphie (HWC)