Saturday can be a bit chaotic, especially if you want to park on the course.
And if it’s icy, by that time the course can be well polished which makes getting up there “interesting”, so for a Saturday arrival I’d be looking at camping on the flat. Also by then all the good spots within a mile of the marquee will be gone.
I haven’t helped with the parking for a couple of years now but it used to be only campervans up the hill because past experience was that caravans on ice on a steepish climb caused too much chaos. If you’re camping with a tent, then you’re directed to the flat lower ground anyway, and your car was parked offsite about ½ mile away ie drive in, drop off tent etc, drive out, park car.
My preference for a spot is on the course far enough away from the marquee and the noise so you can get some sleep if you need it. It also means that you get some heat into your body from the climb because there’s a long descent to the marquee and you can be chilled if it’s really cold.