Not so much in late August but in early August in Interior Alaska (the area around Denali and Fairbanks), the days can be annoyingly long. And even if you went to bed at 10 or 11 pm when it was finally getting a bit dark, the sun will hit your tent from the NNE about 4 in the morning, and you’ll wake up sweating from how much the tent has warmed up in the sun. So camp with lots of trees to the east to provide more shade in the morning to avoid that.
And a cheat, if you get to a point of saying, “screw it, I just want a solid night’s sleep” is to car camp in your car. Leaving the car idling with the A/C running only uses 1/4 of a gallon per hour in a 4-cylinder car so it’s 2 gallons for a sold night of ideal temps and no bugs. I’ve done that on the North Slope, north of the Brook’s Range in part because the enclosed tent (which you want for the mosquitos) gets too hot in the continuous sunlight (and there are no trees for shade).
Summer in the Interior can also be really smoky do to lightning-started forest / brush / ground fires (yeah, the dirt is so organic-rich, it burns). It varies a lot year to year, but if you have asthma, you might want a Plan B in case this summer has lots of large fires. If air quality isn’t an issue for you, driving past huge (like an hour or two at highway speeds), unattended forest fires and their smoke plumes in BC, YT and AK have been very memorable experiences for me.
And bring enough DEET for your dog, too. Light clothes help, too. A lot. Sometimes I survey people’s backs at a summer gathering and there can 5:1 or higher ratios on dark to light clothing. The little buggers use both CO2 sniffing but also infrared heat sensing and I assume the dark clothes are putting off more IR. And/or most of our warm-blooded critters are dark, so they’ve evolved to seek out dark stuff.