But isn’t it difficult to fashion clothing from such small insects?

One of my favourite solutions is to just work furiously with shorts and a t-shirt. Constantly moving keeps the bugs away but you still get bitten quite a bit. Then when you’re done work, you jump into an ice cold lake which soothes all the bug bites on your skin. Then dry off, put on the jeans, boots, long sleeved shirt and sit around the fire.