Perhaps I missed it if it was brought up.
What do fellas do (like me for instance, traveling 2,600 miles) who would have to fly to Gettysburg? I know that you can't take powder aboard an aircraft. I take it that there are Sutlers and the like, who will be selling powder and caps there. I'd image for the ones who are traveling by vehicle and were short some cartridges, could roll as many as they needed while there.