If you are looking for campaign diaries my party has been keeping campaign diaries for years on our campaigns. We had an urban campaign with a complete diary, 16 sessions, maybe 25 pages of text.
I think its a great example of how to run a city campaign, but the campaign diary isn’t trying to teach anything its just a record of what happened.
Here is a link to the to the webpage that the players got explaining what the campaign would be like. All the plyers already know the world well, so it doesn’t go into to much detail.
Here is the link to the campaign diary. It was written one entry at a time so start at the bottom.
Thanks so much for sharing it, I will definitely check it out!