By the Fire is a group that includes a lot of conversation on historical reenactment. There
also is a group specializing in the Civil War. I suspect we really need a group specifically related to nature venues as I know there are naturalists and others telling in nature centers. The group, Animal Stories, is as close as we seem to get, but you can always use the search box at the top of each page to hunt for specific keywords.
With over 1800 members from around the world, I suspect you'll find this is a good spot to network.