I once (when YMX was "busy") had to fly a part up for one of our stranded DC-8's from YYZ, in my buddy's C182. It was the middle of the night when I arrived, in the dead of winter, and the wind was wailing. I asked "ground" where I could tie down. There was a long pause...... He eventually came back and said that there were no tiedowns, so I should just look around for a place I liked, to leave it for the rest of the night. I taxiied around... I took a long shot: Could I park it up tight to the terminal, under a gate? "Yup, that'd be fine!" So there it sat until the next morning, looking very out of place! That teminal was never actually "busy".
I havn't been there for decades, I bet there's parking anywhere you want now...
Pilot DAR