I would expect skeets in Many Glacier, especially if you take hikes below the tree line. I did a week-long backcountry backpack tour in Glacier. At every campsite they were everywhere. The wind usually blows so hard at Waterton Village that they probably won't be a problem, at least during the day. although I have a vague recollection of there being some back in '99. When I was there in late June of '09 it was so cold and windy that they were not a problem.

You might have them in Browning, too. We stopped for a rest at the junction of U.S. 89 and MT 49. There were skeeters, but not an overabundance of them. That might have been due to the heat of the day. They are most active early monring and evening.

But I am confushed about your rotue. Are you crossing Logan Pass from St. Mary or just riding up and back down the east side of GTS? If the former, how do you plan to get to Waterton Village, which is back on the east side.