Notwithstanding any other provisions of law to the contrary, includ-
ing Code Sections 20-2-188 and 20-2-411, county and independent school systems may use school buses to provide transportation to students and others to attend summer camps or to participate in other recreational or educational activities if the cost of such transportation and of any additional insurance costs deemed reasonably necessary by the school system are reimbursed in full from public or private funds other than public school funds.