You beat me to it, Linda. It meets all four requirements. I started to write a list of some of the guest artists I recall, but it got far too long. here's just a sample, in no particular order:
Artisan, Cockersdale, Jez Lowe, Nancy Kerr/James Fagan,Tanglefoot, Vin Garbutt,Eileen McGann, Pete Morton, Old Rope String band, Pete Morton.
Johnny Silvo and Bob Fox will be guests in May and June.