In reply to mikestr555:
I agree with Mike - midgies aren't usually *too* bad in June. July and August much worse... But they can be if you get damp and calm conditions. They can be as bad everywhere - the ones in the west tend to have teeth, but the east can be just as bad on a bad midge day. As has been said, go high and look for a breeze, and seek out places that have had a couple of days of dry weather.
Personally, I'd try and plan it so I didn't have to decide where I would climb and could be mobile - get a camper van for the trip maybe - Big Tree Campervans and others do hire. That way you can go wherever he weather is best. Put together a hit list from NW/ Skye/ Glencoe/ Cairngorms/ etc and then go for it. If that's not an option maybe base yourself somewhere like Inverness/ Spean Bridge where you can access east, west, north or islands as a day trip if needed.
There are loads of brilliant routes at the Severe and thereabouts all over Scotland - if you want some specific suggestions for areas then I'll happily give some as I'm sure others will, but there is soooo much to go at
Enjoy!
Isi