I'm on the other side of the 100th meridian, and in the Southern Highlands I hardly ever have a bug problem. But if you end up beside some swampy area...
I backpack ultralight with a 1 pound 3 ounce tent, so I don't see a tent nest at several pounds as an option. DDT helps. But if I do get into a bad area I have a small pack of screening sewn into a cone, with a shoelace on the tip. I can tie it to my pole and use a couple of safety pins to attach it to my sleeping bag about waist height. Then spread out the cone for head and chest protection.
To me the sleeping bag is the primary protection. A sealed tent keeps out almost everything if you don't use your flashlight a lot.
