Hmmm, Our first year at Powell in 2004 we had bad gnats. We thought it was the area we were in, not the date
Our first night of hell on the lake after getting blown off the beach at Cookie Jar and then in a really bad storm in the middle of Padre Bay in the dark. We finally found a spot to anchor on the peninsula between Gunsight and Padre Bay, it had a lot of tamarisk bushes. The gnats were so bad our ceiling in our houseboat was black with gnats. We learned to close all our windows and turn off the interior lights and run the AC. Later on that same trip we ended up at Dungeon canyon and had very few gnats at that location and the last day we ended up on the east side of Gunsight and had very few gnats as well.
Our normal trip now is the last week in July / first week August and the gnats are not an issue at all during that time.