Keep in mind it is very hard to be period correct(PC) in todays muzzleloader seasons, I'm sorry but my possibles bag and Powder horns just clash with the Blaze Orange one has to use because of the laws. I don't know about you but it scares the devil out of me to be be hunting with any kind of rifle in any part of the country in camo or neutral colors.
Been there and done that when I lived in Colorado, during Bow season the states muzzleloader season came in, Bow hunters where in full camo and ML's had to use blaze orange, not a warm fuzzy feeling to say the least if you are a bow hunter and I have been on both sides of that mess.
Now just think of where you hunt, add in PC correct buckskin clothing and accoutrements, the glint of a brown gunstock and the brownish white flash of your horn in the morning sun, down here in SC you would be shot or shot at, most likely more then once if your on public land.
The same Idiots that jack you in cars also hunt.
In a perfect world we all would like to be PC while hunting with our favorite muzzleloader, but we can't so we make the best of the situation even if we use some plastic container or do dad after all our number #1 rule is be as safe as you can be, theres no sense temping fate with the morrons and idiots that are also out there.