Your daughter will be fine, we don't give our youngsters enough credit
My grandaughter got involved in a charity at 18 and travelled to Kenya on her own , was beside myself with worry, she lived at first with the masai helping in a school, she then moved onto a nursery school where the children were very young, she came back after a month, the following year to went to a similar country to help with irrigation, all paid by her or with family help
So pharmaT, she will be fine, no doubt she has a mobile phone
LM