What does Judith tell Adam and what does this suggest about Cold Comfort Farm?

Judith tells Adam he should prepare to meet Flora at the train station later in the day. Adam is aghast and references the hidden family secret. He reminds her he hasn't driven the cart in almost sixty-five years, but Judith tells him he can drive to the station six times before the pick-up to refresh this skill. This suggests two things: first, that no one visits Cold Comfort Farm except perhaps from the general vicinity of the farm and second that there may be a horrible secret that may or may not endanger Flora.