6: You can game every day for a week. Describe what you’d do!
I feel like this should have been question 7...
It depends who’s available to play or GM.
(Nearly got through a week without an “it depends” answer! Oh well.)
I actually did this in the spring sharing a cottage in the Highlands, and because the organiser had a bag full of one-shot indie games he never got to run we mostly played one-shot indie games.
If I organised such a retreat I would plan something like a mini-campaign in the evenings, much like my one-term-only campaigns covering as much story as a busy movie or a shortish trilogy, and see what else people would like to do in the afternoons.
Ah, but what would I run? That depends who’s there too.