Eligibility for Overtime for School Drivers
Any employee whose minimum conditions of employment are subject to the provisions of the Payment of Wages Act, 1936, the Minimum Wages Act, 1948, and any of the establishment-related labor laws such as the Factories Act, 1948, State Shops & Establishments Acts, etc., is entitled to overtime wages if required by the employer to work beyond normal working hours on any day at the enhanced rate fixed under the respective law. Therefore, drivers employed in any private educational institutions are not exempt.
Like any other employee required to go on tour in connection with their employment, the drivers of educational institutions are also entitled to a daily allowance towards the expenses of their boarding and lodging. When the management arranges such things officially as well as formally, there is no necessity to pay a separate daily allowance in this regard. I think you understand what I mean by the adjective "formally" - it should be a decent arrangement of a comfortable stay for a person, not just asking them to sleep in the vehicle itself or in the veranda of a host school exposed to the atmosphere.
Working Hours and Allowances for Drivers on Tour
As for a driver of a vehicle, their working hours would normally revolve around the total hours spent on the wheel as well as the waiting time in between. But when driving a vehicle on occasions like educational tours, it would be difficult to precisely calculate the exact hours of work. Therefore, include some extra money towards this in their daily allowance on tour. Since the safety of the travelers/students on such tours is in the hands of the vehicle driver, try to keep them in good humor by your magnanimity.