If you live in the sticks I presume you have a car? Why not just drive them to school or try and organize a club among parents. I do this for Duke of Edinburgh Award, which is after school, with other parents of Day Boys and it works well. I would not be happy with the situation as it is,even being chaperoned by a 15 year old. However, I do have to add that its entirely your choice to send them to a school that is not the nearest to your home, so you have to be prepared to put your self out to make sure your children are safe while getting to and from that school.