Wow. I’ll bet it’s very spooky.
Have you found anything besides bullets.
We used to live in Michigan and found out there was a civil war training camp not far from our house. All vestiges of it are gone.
My son wrote a school report about it and we think we knew where about it was. Kind of wanted to go look around but the area was completely built up so there wouldn’t be much point.
But back to your question, the best finds are artillery rounds. You have to take them to an expert to "safe" them because black powder is really unstable after over a 100 years. My friend found a completely intact 3 inch shell. The artillery man cross thread the fuze so it was a dud. You could see you see marks on it where he banged on it to try and get the fuze back out! Who bangs on a live artillery round? These guys where in a desperate situation I guess. From the fuze it was a CSA round too.
If you want buttons and stuff like that you go to encampments. Encampments are harder to find and it is not illegal to relic hunt on them. You just need the owners permission. The trick is to research on letters and sometimes a soldier will say the regiment camped on so an so’s farm for 2 weeks, then you have to check records but you can find it if you try. If might look like a deserted field or even under agriculture today but a long time ago a regiment camped there and they usually dropped a lot of stuff while there. I think a lot of it is from soldiers just tired of lugging stuff around.
This is what a 3 inch CSA round looked like. I have one on my attic somewhere, it has been professionally mounted on a wooden display wall art type setup. It has a chuck out of it so it is not worth much. Sometimes the shells didn't disintegrate properly and just a chuck blew off. A lot of those still laying around.