I recommend finding a real task that might be less challenging. If you have a unit commander / headquarters that makes an effort to function as a real HQ, then there is plenty of clerical work to do. Our reenacting colleague Mr Shaffner is making a reenacting career of doing this. Or consider the Subsistence Department, providing real-world, real-time rations. (Believe it or not, you can eat "by the book" for a weekend at far less expense than if you cart along lots of modern food.)
My 2 ¢.
Rob -- your keyboard doesn't have a ¢ sign, but your computer has a hidden one. You just need to know how to get to it. If you know how to access the alternate character set, try "ALT 155".
I can't guarantee that others will see them. If you see gibberish instead of four "cent" signs ¢¢¢¢ in this sentence, disregard my suggestion.
"God gave us two ends - one to sit on and one to think with. Success depends on which one you use. Heads you win, tails you lose."