Poms From Oz we heard you a few years ago at Chester Festival. Nice stuff.

Have a look on Alba Folk Some of the info is a bit out of date but most of it is still good. Then there is Folk In Fife, which is very upto date.

And the Music across Perthshire site gives good info as well.
Perthshire Amber, a 10 day festival based at Pitlochry with local hero Dougie MacLean doing lots of gigs is on around your visit.