In reply to Doug:
> I can remember it being full & overflowing on summer weekends in the 1980s, but also being the only car in the carpark midweek
That's interesting - I think I might first have gone there in 1981 but was definitely there on a hot/sunny Saturday in August 1982 as Lochnagar was my first Munro and was climbed from the Spittal. Can't really remember but I'm sure the car park (smaller in those days?) was only middling busy that day whereas on a such a day now, even without Covid, it would probably be pretty much full. I lived in Aberdeen 1979-85 and, like you, can remember very quiet midweek trips - driving along the glen road without meeting another car and then finding only one or two in the car park.