Just because something was around or invented during the Civil War does not make it acceptable at a reenactment.
Let me give an example: pasteurized milk was invented by Louis Pasteur in (I believe) 1864. A 'know-it-all' will sit at their camp, speaking not only of the process of pasteurization, but will also speak of the bacteria the process kills, thus making a healthier drink. This person will then pull out milk to drink, stating quite confidently that it is the newly invented pasteurized milk.
I can tell you here and now that would not have happened in the 1860's. No way, no how. It wasn't until well after the turn of the 20th century before Louis Pasteur's invention took hold.
Another example, albeit in a different vein - - - let's say it's 200 years in the future and these future folks are reenacting (for some odd reason) the era of the 1970's. A futuristic person does research and finds out that the first computer sold for home use to the general public was in the mid-1970's. So, Mr. Future-man says, as he puts a replica antique computer on his desk, "It was first sold in the 1970's so I can use it for my presentation!"
Now, I don't know about you but I saw my first home computer in the 1990's, and that was a rarity. Virtually no one had a PC in the 1970's.
Are you understanding what I'm trying to say here?
I could give plenty more examples of this if you'd like. Just think about the inventions in your own lifetime: the compact disc was invented in 1965. I know of no one who had a CD back then. Or in 1975. Heck, or even in 1982!
But, there are those who feel justified to speak, have, or know about something while participating in a Civil War reenactment just because "it was invented in 1861."
Unlike today, news did not travel very fast in the mid 19th century, so, in Louis Pasteur's case, I am sure the greater majority of people of all classes living in the U. S. in 1864 did not hear of his process until much later. And, when they did, I would still bet the greater majority did not even understand what it was.
Or even cared.
Not that the Victorians weren't smart. Quite the contrary, as most of you well know. But, germs and bacteria and the like were beyond most average folks understanding at that time. Not unlike we here in the 21st century attempting to explain a radio or television to one living in 1860, transmitting radio waves through space. That would certainly be beyond their comprehension...just as many of the planned futuristic inventions yet to come in our own modern time can make our heads spin.
If you want to do an accurate impression at a reenactment, you'd be best off studying the decade previous as well as reading period newspaper and magazine advertisements and articles.
That will allow you to give the folks (as well as yourself and your co-living historians) a much better presentation.
Here's a little something to get you started:
Completion of Jackson Biography and Civil War Ads