A womans shoulder bag is the ORIGINAL possibles bag still in use today... coach is just more expensive.
This is one thing I tend to keep as simple as possible and typically I use canvas military ammo pouches or other pouches that hook up to the old webbed belts and put it on my belt in front of my knife. Two pockets, simple, and accessible.
I prefer the use of a speed loader of some kind, whether a rolled up paper cartriges or plastic loader. If I'm using conicals, I will absolutely use a plastic 58 caliber speed loader. With round balls, on the other hand, I use either the speed loader or a paper cartridge that are easily made.
Loading blocks are the easiest way for me to load a round ball and I use one that has a push pin attached to start it.
All this and a pan charger are easily stored in a small canvass pouch on your belt. If I need anything beyond this, its in my fanny pack or back pack.
Aloha...