Okay... that's the airshow NOTAM, now what if I want to arrive prior
to the airshow?

Come on over. Parking space may be limited, since many performers
stay over also. The ESSO FBO is likelier to have room. Call ahead
if you're worried

What is the url for the Toronto Airports website?

A web search produces answers quicker than usenet:
http://www.torontoport.com/PortAutho...pilot_info.asp
http://www.copanational.org/PlacesTo...id=1&ap_id=183

Thanks, Frank.
They changed their URL from what I have previously used several years ago.
I used to park at Shell on the east side. Are they still there?

I just emailed the airport manager for info.
Hopefully, I will get a response tomorrow.