Yes - there should always be more than one room owner.
You should, at least, add the person who is taking over from you as a Room Owner. That means they can add other Read/Write users during their shift.
You don't have to wait until shift changeover to add people. As soon as you know who is coming in on the next shift you should add them - it saves time at changeover and avoids a single point of failure i.e. having to recreate a room.