Hi
of course it's a good idea! I reckon you should be ok May/early June, it tends to be worse late July/August and apparently it will be worse this year due to a mild winter.
Try to avoid the West and places near water/forests. Also, if you do a search for Midges there is lots of advice on the forum of how to protect yourself - I used to do volunteer work for the NT and was told to apply Avon Skin So Soft, apparently the Army use it...!
Make sure you don't miss out on the East of Scotland either, perhaps do that on your way back?
kind regards
Mark (",)