I grabbed these off FaceBook where they were posted by Scott Beadle who writes "The cartoon flyer is drawn by Bob Montgomery, the middle brother of Vancouver punk rock drummer legends Chuck Biscuits (DOA, Black Flag, Danzig) and Dimwit (Subhumans, Pointed Sticks, Four Horsemen). Besides cartooning, Bob served as roadie for all of these bands, and more, during his career. I also have several crappy colour snapshots of YMG from this show."
I don't think they're crappy at all :)
I'm jealous as I never got to see these guys.