Kilt wearing is rather patchy. I'd say if you wore a bright tartan kilt, Chacbalam, here in the Scottish Borders you'd stand out as a tourist, though a dark tartan such as black watch or an all black kilt would be more commonplace (I've been out wearing a black kilt on Sunday and again today). However there are a few pockets of Scotland where happily, tartan kilts are more widely worn, Perth and Inverness both spring to mind.