An upgrade for the caravan where you add a card table to it. (requires a table, a deck of cards, gaming dice)
This allows you to play games with your caravan buddies to raise morale/sanity and pass time
You can pass a little time with a little boost to morale/sanity for free, more gold can be spent on bigger and longer games to pass more time and raise more morale/sanity
The more caravan followers you have the more the base sanity/morale gain becomes, but also raises the price of the gold cost games
Give it some kind of a cooldown inbetween games so it can't just be spammed
This doubles as both a way to pass time to reset dungeons but also a more lifestyle part of a merc's life in a caravan. (doing things with the other caravan people)