I think it is very powerful to establish some sense of normalcy and familiarity in an abnormal and unfamiliar situation.

Establish a daily routine. Chores, tidying up, washing and hygiene, exercise, group time, private time ... not an overload, but sense of purpose and direction throughout the day.

Games are good, especially a few familiar ones. Card games can eat up a lot of time. A package of balloons takes up very little space; yet balloon volleyball (kids, kids and adults, kids vs. adults) can be a tremendous, silly stress reliever.

The other thing might be a "formal" forum where kids and adults can talk about things that are worrying them. Call it a family meeting of sorts. It doesn't matter that you can't solve all these problems; it's important to have them heard and acknowledged by the group.

My 2¢.