Update from local and very helpful Highland Council Harbour Master - seemingly the slips here are not public, though I note elsewhere on here it's suggested that is so:
Slipways near Kinlochbervie
From: Neil Gudgeon [mailto:firstname.lastname@example.org]
Sent: 03 June 2014 10:09
Cc: Tony Usher
Subject: RE: Badcall pier/ slipway - was RE: Thank you RE: Pontoon / slipway
The slips and piers at Badcall are not part of the Highland Council, I think they belong to Loch Duart Salmon which would explain the telehandler parked there.
It may be worth giving them a call to confirm this and possibly negotiate permission for future use, Tel: 01971 402451.
Hope negotiations work out for you.
Tel/Fax: 01571 844247