I have not seen a Notam for Errol, in a long time. This is due possibly, because I am one of the aged PPL who also struggled to find them. Only recently, the advent of Sky Demon, where they pop up perfectly on the RHS of the page, have I actually started looking in more detail at them. That said, in over 1000 hrs of flying, I have never contravened a NOTAM (that I am aware of).
I fly over, or close to, Errol, almost every week, and I have never heard Perth Radio, give a warning about Errol being active. Nor Leuchers.
Dundee will tell you if it is active, but again, and I may be wrong, it is closed more often than it is open.
I was also unaware that it was an active ATZ, unless notified on a NOTAM
