Answer: Yes and yes. Based on the information provided, the family meets the definition of homeless in the McKinney-Vento Act because they do not have a fixed, regular, and adequate nighttime residence; this definition specifically includes children and youth who are living in trailers and campgrounds “due to lack of adequate alternative accommodations.”
The student therefore has the right to remain in her school of origin, if it is in her best interest. Assuming this is the case, the district must provide transportation to and from the school of origin, per the McKinney-Vento Act requirements. Since she will be crossing school district boundaries, your district and the district in which the family is camping must apportion cost and responsibility; in the case that there is a disagreement, the two districts are required to split the costs.