> The higher up you go, the colder it is to the point you don't get that many insects at all.

My experience doesn't completely agree with that.

Everything up to and including the Brooks Range was horrendous for mosquitoes in summer, same over on the Dempster Highway in Canada. Once you get within ~60 miles of the Arctic Ocean the temperature does drop enough to get rid of them, but before that it's a nightmare.

The mosquitoes are pretty rough up on the north slope. They're even worse than the Anchorage area (and bigger, too). Anywhere there's lots of standing fresh water, you'll have mosquitoes in the summer in Alaska.

The wind does make a huge difference though. If it's windy, there's more or less no problem. It's when the wind lies down that they come out in force.

The mosquitoes are bad enough that blood loss due to insect bites is a major contributing factor to caribou calf mortality, believe it or not. The caribou actually seek out drilling pads because they're elevated (~10 feet) enough to catch a breeze and get "out of the swamp", which helps keep the mosquitoes down. Thus the pictures you'll often see (yay, PR spin) of caribou swarming oil production facilities on the north slope.

Or south enough. Bonus is that in south you'll also get denque, yellow fever and malaria from bites.