YM Rocks was kind of like Hillstock at Forest Hill Collegiate. It was held outside behind York Mills Collegiate so it must have been Spring 1988. I don't remember what we played specifically but I'm pretty sure it was Aqualung by Jethro Tull and Assaassing by Marillion. I think Harlan Cooper was the bassist at the time because I don't think anyone else went to York Mills Collegiate. From what I recall it was a pretty good performance.
The band lineup was:
Darrin Cappe - Vocals
Mike Graham - Keyboards
Meredith Halpern - Vocals
Phil Shoore - Drums
Harlan Cooper (I think) - Bass
Jeff Veidlinger - Guitars