Black flies β there really is only one solution to them: don’t be hanging out until they are gone for the night. That means waiting for darkness to come over the land. Then the party can get started.
Black flies aren’t out all night. So that’s the best time to up and own doing things. Like cooking dinner, drinking beer, and hanging out by the campfire. There is nothing wrong with staying up all night during black fly season, because the days really aren’t that wonderful, if you don’t like getting eaten alive.
Granted, in the darkness, you are somewhat restricted in what you can do. But bring a flashlight, and hell, maybe a bunch of Christmas lights, party lights, and big bright 100-watt equivalent florescent lights, and pretend it’s day light. It’s also cooler, and generally much nicer in then in the day time.
During black fly season, the whole purpose of the day is to be sleeping, and recovering from the hang overs of the previous night.