Glad you liked that video and hope it helps answer some of your questions, all four of them I think will help with what your looking to do. If you do a quick search online you'll get the same regulations pop up multiple times from several sources. I'm not sure of the exact way the flour is ground, I believe they have a video on the topic. On the Confederate side they were issued parched corn which they would roast then smash into a cornmeal. The coffee and sugar question is answered in the haversack issue. they would carry their issues in small poke sacks, sometimes the men would mix their coffee and sugar ration in the same sack.