Like I said, the "feeling" comes at odd times.
We took the entire NC 1st Battalion (Confederate) up to a smallish reenactment in upstate NY years back. Just for grins, we all got out of the buses (about 150 of us) about a mile or so from the site. Got into uniform and heavy marching order, that is with blanket rolls, packs, etc, just like a unit on the move. We formed up in a column of fours, unfurled the colors, got the drum going and we marched the last mile to the camp with muskets at the right shoulder and fixed bayonets. I was near the rear of the column and the tramp of marching feet, the drums, the muskets swaying in time with the colors in the distance, yeah the feeling was there. We marched into the reenactment like that. The column halted, we formed into ranks and stacked muskets as proscribed in Hardee's. It brought the entire place to a halt.
Later in that same reenactment, we gave the Yankees a thrill. We treated them to a full on, by the numbers bayonet charge complete with fixed bayonets and a Rebel Yell. Done correctly, it starts slow at the half step as the ranks form, then picks up speed and pace and is done at a dead run for the last 50 or so yards. Folks afterwards told us it was chilling to watch a gray tide tipped with steel start moving forwards faster and faster with the "Seccesh" screaming all the way.
Blue or Gray, nothing can be taken from those guys for sheer guts and courage.