One of t=THE best festivals anywhere, in July, which we have been going to for a good many years: of course, this year, as with many others, it was cancelled but they still ran a very good series of online events: concerts, workshops, competitions, etc.
And Stonehaven Folk Club: a really friendly club with weekly events on Friday nights, some sessions, some with guests. They have been running weekly Zoom sessions since lockdown, sometimes with a guest spot, others "just" members singing/playing. An "away weekend" once a year or couple of years, which is great too.
Not too far from Aberdeen, which has its weekly Folk Club on a Wednesday night (currently also online).
And a bunch of other folk clubs and festivals around the North-East of Scotland if you're up for travelling a bit further.
Just love the place: would willingly move there (live in Edinburgh) tho' maybe not town centre, which has had its flooding problems! Most of the rest of the town is uphill out of it!