I keep my IC and OC stuff firmly separate, partly so I can find my keys when stumbling back to my caravan in the middle of the night and partly so I don’t pull out something jarringly OC at an inconvenient moment.
I have a concealed zip pocket within my hip bag which has my OC gear (keys, pennies, lip salve/medicines, hand sanitiser).
The rest of that bag has IC money, resources and my potion physreps and cards.
I then have a second, over-the-shoulder bag which is bigger and stores all my paper - two notebooks, various pamphlets, song book(s) letters and pens. You will need a notebook and a pen/pencil (you can buy IC ones from the traders but have a look, you’d be surprised what could be IC from regular shops at home).
I always try to have some kind of non-alcoholic liquid on me at all times; on the battlefield that is a disguised Camelback which I tote around on my back, off the battlefield is my glorious copper mug which usually has either water or nettle tea. Previous characters had a leather pouch with a plastic water bottle concealed inside (which I took on the battlefield), and a glorious leather-and-gold covered wine bottle which only ever held water (which would have never gone near the battlefield in a million years).
I must have more stuff than this but right now I can’t think of any scratches head
Plan to have pockets, plan to have bags, but I prefer a couple of medium sized ones to one big one, which I found just ended up swallowing all my stuff and I couldn’t find anything.
Other threads of interest: