While getting down from bus at an intermediate bus stop, always ask the conductor about the break time and come back at your seat just two to three minutes before.
Take cell number of bus conductor. In case you miss the bus at any stop then it will help you to track him or catch the bus at next stop.
In case your family members have not got adjacent seats during automatic seat assignment then make a humble request to other travellers and try for seat exchange so that all of you can sit together.