Boy, you are in the thick of it for re-enactments! I really envy you the historic possibilities in the area.
But, believe it or not, we have re-enactments here in Arizona, too. There actually was a tragic little dust-up at Picacho Peak, about 70 miles south of here, where two small contingents from each side accidently met up.
After some fighting and some dead, all of which made no difference to anything whatever, the detachments went on their way.
Anyhow, the following image was taken at one of the re-enactments of the Battle of Picacho Peak about two years ago. I found the 70-200 to be very useful for pretty much all images. The 200mm end was plenty long enough to get close enough to some of the artillery demonstrations to be able to photograph them fairly satisfactorily.
This particular image is helped by some of the residual smoke from the artillery (trying not to say canon here), which I think lends an air of disorientation. The image is also helped by my removal of a Saguaro cactus from its middle. While historically accurate, it kind of dominated the scene.
70-200 mm at 150mm, f/8:
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