I've been following this thread with great interest. Some of you know and some don't that I have tribal registration (state recognition) in Vermont, though I live in NH. I've been biting my tongue any number of times reading this whole thing.
@johan_steele has put all my thoughts into wonderful words and
@captaindrew suggestion about the Seminole reenactment thing in Florida is very sound.
I know Captain Drew and I would follow his advice and try to join up with this Seminole reenactment group. Even if it is many states away from where you live, a lot of reenactors travel for that hobby. I would send a PM to Captain Drew for more advice on how to get started into that, if you are serious. I really like your idea but I think for you to be successful in it, you need a GOOD mentor in it going forward, not just striking out on your own.
I, personally, would stay away from anything, and I mean ANYTHING remotely involving Cherokee. There are A LOT of issues that have been going on with the different bands and that is all I'm going to say about the matter. If you decide to venture in on that one, well, on your own head be it.
War paint and such - one thing to remember that depending on the different bands/clans/ of any group, but not usually at so late a date as the Civil War, they would hire out other bands/clans to do their dirty work and some of them would use war paint as disguises. So that's why I strongly encourage getting in touch with this Seminole group in Florida. Here in New England, the Nipmucks had a reputation for being up for hire to do hits on other tribes. But we are talking late 1600s and early to mid 1700s on that kind of thing.
By the time of the Civil War, most tribes in the SE of the United States, had either been pushed out West or into impenetrable swamps, or into enclaves like the Lumbees who were wearing western clothes. Certainly the Indians that rode with Forrest wore regular Confederate clothing, in the sense of did anyone have pants and shirts and boots. They weren't a stand out of "Indian Clothes" and feathers in their hair. If anyone remembers Diane Jones from CWT, her GRANDFATHER rode with Nathan Bedford Forrest, lived to be 100, and never talked about it. Most frustrating, and he was a full-blooded Indian but he didn't "act Indian or dressed Indian" while he was doing his CW thing. He moved out to California when the big show was all over.
The eagle feather thing, just don't do it.
And as
@johan_steele talked about slashed tires - I've heard of much worse from our tribal historian who is a youngish man and has been out in those reservations. So please be careful with what you do which again is why you need to hook up with a really good mentor so you get a good start and don't get off on the wrong foot and get dug into a hole that you can't get out of.
Heck, I was at Old Fort No. 4 in Charlestown, NH doing a reenactment as a Colonial. I used to work as a weaver and spinner at Strawbery Banke in Portsmouth, NH. Old Fort No. 4 is a rebuild of where the real Old Fort No. 4 was to protect settlers in the "western frontier" of NH in the 1700s. There was the man who was a Seneca who had developed a reputation for being a real a@@ and while I was in my Colonial outfit and holding a flintlock for one of our friends, he just went off on me! (He must have recognized me). I didn't even know his name but he just went off on me on being tribal and what little blankety-blanks our whole tribe was/were back in history, etc, and SUDDENLY I had this thought - and the thought was "flintlocks were made for Indians like you……"
I found out later that this man, who is Seneca thinks he's big time stuff at reenactments and wants other tribes out. Even if I'm a colonist for the day

I don't want that to happen to you when you are on your own and you don't have "your people" around to help guide you through that. Because it only takes one or two people like that to spoil reenacting for you forever. I just laughed it off because after you work at a museum and help, on an average 275 people a day, spin or weave, you deal with everyone! But if you haven't dealt with a "special case" like that before, it could really put you off.