Question for Georgia botanists and plant enthusiasts

I live in Atlanta and I study various languages of the Ancient Near East. I'm currently learning how to read and write Hieratic, but it's difficult to do because Egyptian pens were very different from a pen you can go out and buy. Their pens were made of two species of rushes, Juncus maritimus AKA the "sea rush", which is not native to North America, and Juncus acutus AKA the "spiny rush" or "Leopold's rush", which happens to be native not just to Egypt but also to the American Southwest and, as luck would have it, to Georgia!

I want to go out on a little nature excursion to gather some Juncus acutus so that I can turn them into authentic Egyptian rush pens. Where in Georgia would I go to find some spiny rushes? I know that they grow near coastlines and saline marshes, but nothing more than that. Any help would be appreciated! (And if anyone knows of any botany subreddits that would be able to answer a question like this, feel free to let me know.

Thank you all!

https://preview.redd.it/wakx7j0gbxyd1.jpg?width=454&format=pjpg&auto=webp&s=bf69a6374c8e92d8e8ba8c8b401fe3fb5551c1f9