How zoomed in are those pictures? The first one doesnt look like a gnat to me. Looks more like some kind of beetle. The second picture kind of looks like a mite if its zoomed in enough.
8 legs on the second pic means it is a mite or a tick, and it doesn't look like a seed tick.
Captain jack's and or neem oil fast!
Also make sure that you don't come in from the yard to your tent since you or pets can carry pests that can ruin your girls. Good luck.