While don't do it that much, I've caried a clone 1860 colt army around the farm, and since have gone to a 51' navy. I caried a block of wood split in two with 6 cavities for paper cartriges and round balls for a load if needed.
I personaly don't know of any one in these parts who shoot cap and balls, everybody around here want's pyrodex, knight muzzeloaders, shotgun primmers and discarding sabot rounds.
I just started CAS and there's always a couple or three people shooting cap and balls.