Glad to be of assistance!

I found some other stuff which might help: Last year's TMSA listings for Argyll, Stirling, Trossachs - it has contact numbers for folk clubs and stuff

Knockengorroch Festival in Galloway 17-19 May

Highland Festival in Inverness 24th May to 9th June

These last two will involve a bit of a drive but you never know, you might be interested... :-)