My experience has always dictated that the busier that people are, the less time they have to think and lament about their circumstances.

When stranded, start building a shelter (whether you need one or not), have everyone stand a watch, looking for search and rescue units, foraging details (for firewood, water, and/or food), or whatever you can think of that will add to the safety and security of the group as a whole.

Remember back to earlier pioneer days when folks had to entertain themselves, and use those games to keep your people entertained during the evenings.

Hold a morning briefing for everyone so everyone knows whats going on and what is required from them for the group to do well as a whole. Give everyone "ownership" in what is being accomplished towards getting found and back to their homes.

That's my thoughts.