I don't have a swamp, but I have a wooded yard and can attest to most of what you said. However, in addition to the plethora of bug species and legion of spiders, I also have a shitload of mosquitos.

Not in the same climate as you, but we stopped cutting our grass all the time. We mow about 3-4 times a year. It's really more of a "harvest" than mowing at this point.

While the neighbors may not appreciate the shaggy meadow we cultivated, we now have lightning bugs at dusk in the summertime. The neighboring houses? Practically none. I can only imagine what will happen when we start replacing this stuff with local plants.

The tiny "ground attack" spiders, whatever they're called, are legion.

Some kind of jumping spider, maybe? Jumping spiders are called that because rather than wait for prey to land on their web they actively hunt insects.

https://thepetenthusiast.com/types-of-jumping-spiders/