There is a wild camping spot at the Bridge of Orchy. Just over the bridge next to the river. The WHW walks right past it. The hotel there is a pub. So food. Also there are few wild camping spots on the walk into Bridge of Orchy right next to the Way.
It depends when you go, the original poster didn't say when they were going. I camped in May without Midges.
I stayed there on 15 May 2008, just shows you can never tell presumably it depends upon the weather/wind.