Impossible to predict with any certainty, bugs up there can be terrible or a complete non issue. If I were going, I would throw in a head net, and a bottle of Ben's (100% deet). Minimal weight penalty, if you need them you will be glad to have them for sure!
No bugs were harmed or deterred in the taking of these pictures. We had bug dope and nets, but never used them. Just saying, it can go either way. The only reason we wore shirts was to keep from burning, as you can see we are both as white as the (Arctic summer) days are long.Last year up high in sheep country.. I will have mine.