Steve,
I'd not seen the Standing Council of Scottish Chiefs website before...
http://www.clanchiefs.org.uk/

I guess the family, being only border reivers, was canny enough to gather enough wealth and position to merit some kind of status aye . We are not Highlanders by any means but the family does have a bit of history.
In truth, a borderer at the time of their reiving heyday would not of been caught dead in a kilt....but allowances can be made, I suspect, due to Sir Walter Scott kicking off the kilt craze.

The Clan Chief, the 10th Duke of Buccleuch Richard Scott, has the family gather scheduled for 2019 in the vicinity of Bowhill. I'll be bringing the Scott Hunting you made for the formal dinner. I missed the 2014 affair but it looked right well done. Lord Polwarth is usually in attendance too.