In reply to siobhan66:
It's pretty rare to be midged badly on Rannoch Wall - it's usually either cool, breezy or sunny enough to deter them. Tip is to get there early and maximise the time you are in the sun - it faces East and goes into shade at around 2pm.
I must have climbed on Rannoch Wall about thirty-odd times, I can only recall getting midged once. I'd still pack the skin-so-soft and wear long trousers though!