What you are describing here is exactly what I had in mind. Small stuff, just enough to keep up the feel that the party is actually, a party.

- Gatherings around the campfire, conversations which aren't exclusively 1 on 1, but group talks.
- I never played Gwent, but maybe a mini game like Lanceboard?
- Like you said, use seating areas. And the military inspection was a nice touch, I could not quite word it the way I wanted to.
- Party members engaging in whatever really, drunk dance offs for comedic effect, maybe you could have a philosophical debate with Withers and Gale for intellectual effect, who cares, anything goes, just something.