I'm here! Just a bit slow getting up these days, while counting down the last days of my quarantine!
Left hand drive cars with front number plates so not USA.
I'm confused by UV's comment. I live in Alberta, which, as far as I know, is the only jurisdiction in North America, where cars don't have front number plates. Saves the government a lot of money, but must really irritate the cops.
An airfield on flat land with a prominent hill in the distance. I don't know of any hills like that on the Prairies. I had a look at Abbotsford and Boundary Bay in the Fraser Delta, but those don't fit the bill.
The predominantly white number plates might indicate Ontario.