Went in 09 to Atikoken. There were several places where the bugs were really bad. Head nets, Deet, long-sleeve shirt, long pants, really good rain gear, and Jungle Boots.
We hit a lot of rain on our trip. Some of the portages had really bad 'moose muck.' Several ended in mud that was thigh high. Pretty funny to see them try to get out. In these bad portages, we didn't carry the canoes on our shoulders. We had people at either end of the canoe. We'd lift the canoe up, move it forward a little bit, set it down, and use it as floatation so we wouldn't sink so much.
We chose a lot of large lakes on our routes. Really fast paddling in calm weather. In rough weather, we swamped a few canoes (3 people + gear per canoe overloaded every one of them above their listed capacity). Of course, we had a few big boys and adults. :)
If I had it to do all over again, I probably 'steer' the youth to routes with fewer big lakes and more streams and smaller lakes. One adult leader used a hammock to sleep in. That looked like a good possibility for future trips.
The issue tents they used were in pretty sorry condition. Take your own tents if they're decent.