Where does covey send Douglass and why is the trip so difficult?

In "Narrative of the Life of Frederick Douglass," Covey sends Douglass to the Eastern Shore of Maryland to work on a plantation. The trip is difficult due to the harsh conditions and the heavy burden of fatigue, as Douglass is already exhausted from the grueling labor he endures under Covey's supervision. Additionally, the journey is fraught with the emotional weight of being separated from his current environment and the constant threat of punishment that enslaved individuals faced while traveling.