How did Jethro find the way to Beverly Hills?

Anyone find it unbelievable that Jethro got the whole family to Beverly Hills without getting them totally lost? Its hard to believe that he could read any kind of map, I KNOW he could read a little bit, but reading a map can be hard. I wish the pilot episode had focused on their trip to California, like I wonder if the Clampettes stopped in any towns to spend the night, I wonder if they stopped to eat in cafes along the way?

They could have focused on getting settled in the mansion in the second episode.