Running a program such as this at your museum is a remarkable offering to those in need.
You are wise to be considerate, in that you do not want to escalate problems.
Surely, you are also working with professional mental health care workers.
They would be the best to advise you, as they will have some insight into those in the program,
their needs, and what may trigger further problems, or to help settle an individual.
Good Luck!