I think there are a couple guys that go on woods walks with BPs on the forum, and pretty sure there is one or two who said they have carried BP cartridge guns. I have thought about carrying my Pietta 45 colt birdseye once or twice and may do so around the new property come spring but if going to town it’s gonna be my semi auto for me.
If I were going to carry a percussion revolver it would probably be my 1858 Remington Sherrif’s model with my 1851 .44 avenging angels as backup. Still heavy but they are pretty reliable for me with Remington caps.
Yes, I've adopted the cap-n-ball revolver for all my hiking, trekking hunting and woods-walking sidearms, although I'll carry more modern guns once in a while just to give my favorites some love, like Gramp's Luger. Sometimes a single shot percussion pistol. !!! But, when wandering in Grizz country, and packing a bow and arrows, spear, or a .22 rifle, I kind of like the EL Patron, or the Super Blackhawk on me hip. But as long as the long-gun is up to the task, it's usually Cap-N-Ball. (or cap-n-slugs)
I too would, if I had no choice, carry some kind of .44, Remington or Colt with a short barrel over the smaller guns. I could conceal a 5" 1860 or 1863 Remington okay most of the year. Hot summer days/T-shirt weather not so much, I might go to the Colt 1862 on those days.
A percussion revolver can be 100% reliable, but it does take some tuning, a few minor-modifications, attention to detail, and a bit of art and science.