Have had to shift my dates. Now 11 to 21 May (including flights). Are midges likely during this period?
Well the thought used to be that midge season begins towards the end of May. However the little blighters in recent years seem to be extending their activity. A lot depends on the weather too, they love quiet damp morning and evenings in particular, but they hate the wind.
When we get ready early morning after parking up or clambering out of our tents, we try to keep on the move as much as possible, as they target you immediately you stand still. they are usually not a problem once you are walking as they don't like going far, tending to swarm around and stay together. The worse ones are really minute, barely a couple of millimetres and more like a gas than a swarm of flies.