I popped up Beinn a' Chuallaich yesterday.
As suggested in the walkhighlands walk description I parked by the layby at NN707614 on the B847.
The walk description notes that there are very few places suitable for parking along the B847. As I was getting myself ready, I noticed the passing place sign and that it stated No Parking in Layby. There is also a farmers gate here. I was careful not to cause any obstruction and to try and allow room should anybody else arrive, I was in effect parked at the side of the layby.
I headed off on my walk. I noticed a police van passing as I headed up the lower slopes across the road – they seemed uninterested in my parking. To minimise my time on the hill, and hopefully avoid my car attracting any unwanted attention, I retuned the way I came rather than complete the more attractive circular route.
On driving back out I noticed that every passing place and lay-by on the B847 has a no parking sign. Basically, it appears that no parking is allowed on this road.