An old 2014 Toronto Star article on Al and Markham airport (NU8) is still online:
https://www.thestar.com/news/gta/2014/1 ... plans.html
(If the paywall stops you after looking at too many Toronto Star pages, turn off javascript and reload)
For anyone not familiar with Al, it does give some background and his big plans for the airport, big plans that have been around just about forever but never happened. I guess Al did get to use the place for a bunch of landfill, that old dodge / money maker for small airports, and the old military aircraft with no barriers around them were fun to look at.
I have barely visited the airport in the last couple decades so I'm not really in the know.
Just learned to fly there in the 1980s, my dad & partners owned a Champ there, and I had a decades old verbal permission from Al to fly into the PPR airport!
Al was quite the character.