Thanks for the comment about my write-up 😳
The only reason I didn’t reply before is that I have only visited Loch Brittle by sea, so I have no direct knowledge of the road access etc. (I can vouch for the midges, but that’s another matter).
As I recall the beach is of fine, soft sand, and of course faces approx. SW, so could be subject to quite a swell, with surf.
Sorry I can’t be of more help.