An example of creating a decent escape route was creating a hole in the walls between two buildings to allow for them to be able to go around and slip out from another door or window that was not being covered.
It was the same for any room that had a hole put in the middle of the floor or ceiling, they would be able to climb up or drop down if there were some preparations in place to allow it so it would allow them to move around while remaining hidden.
It was only possible for them to be found out if the people looking for them had chosen to take the risk of breaking inside even after they had not confirmed that they were inside.
Not everyone would be so willing to take such a risk since they could get reported for disturbing the other people staying in the motel and they would have to deal with the problems created by damaging the property if they stuck around long enough.