OK, are you wanting to do Cavalry, Infantry, Artillery, Civilian? Yank, Confederate, or both?
It is not a cheap hobby to get into, and there is a lot of fantastic, but also downright BAD info out there that you can unknowingly get wrapped up in. A lot of folk will offer advice, and it will be easy to be lead into the wrong direction. You may not have any idea if the uniformed person you run into at an event, really does know what he's talking about.
I need you to understand something, though...Set your goals high!
The best thing you can do is get good quality equipage/uniform the FIRST time you make your purchase. For example you can't just walk into a place like Fall Creek Sutlery, buy a cartridge box, and assume it's correct. This would apply to anything purchased, at most any Sutlery at an event. A lot of stuff may look like it's what you want, but the big trap is once you purchase something, you may be stuck with it, and have a hard time trying to get rid of it for, something that is truly authentic, and holds it's value latter on.
There are products being made by a select group of folk who take pride in their work, and research, and if you purchase their goods, they hold good value. They may not be cheap, but this hobby is nothing you want to skimp on if you intend to go the long haul with it.
Also another thing to understand is that if you purchase QUALITY stuff, you may be able to go reenact, or do living history at places that typical mainstream reenactors won't get invited to. There are a lot of groups out there that will set up an event, either on NP Battle Ground Parks, State Battle Parks, or, even on private land. They will have serious qualifications they want the attending folk to adhere to, so they can try to recreate what it was like 150+ years ago. Groups like the WIG (Western Independent Grays) have a good reputation with NP, and State Park folk, and set up events that are great to attend. I have joined up with them at their events, though I'm not a hard core member. They send out notifications of the event, set standards, and folk from all over the country rally to attend. There are several groups like that all over the Country.
If you are able to get with a good authentic minded unit, you may be amazed where you can go, that mainstreamers won't be able to attend.
Not intending to scare you, just something I learned way early on.
The
Authentic Campaigner has been listed on here, and it's a great place for information on who makes what quality uniform/equipage.
Use their search function, it's a valuable tool! They could direct you to a unit in Indiana that suits your requirements.
Just to whet your interest, here are a FEW places you can look to see quality goods, it is in no way a complete list...
http://wwandcompany.com/ Uniforms/clothing
http://www.missouribootandshoe.com/ Shoes, leather goods
http://crchilds.com/ Uniforms, clothing
http://www.olsonstinware.com/ Tin ware
http://www.njsekela.com/featured_products.php A lot of quality items for the hobby.
http://www.benderhats.com/products.html Hats. (He's closing shop soon!

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http://clearwaterhats.com/Civil War/civilwarcontents.htm Hats.
http://www.dirtybillyshats.com/ Hats.
Kevin Dally