Lewis Powell: The conspirator who was "different."

[Gene C]

In the thread "What was the Role of David Herold", post #320, BettyO mentions

"In truth, Powell was afraid to go abroad in the city in daylight due to his previous arrest in Baltimore in March of 1865 by which he could be re-arrested (if recognized) and sent to prison again. He did know his way about sufficiently to find his way to the Surratt House (at least 2 times, once after the kidnapping attempt and then including upon his arrest)."

So why head to Baltimore after the assassination?
Wouldn't he be more likely to be arrested there?
Would the Branson family take him in (especially the head of the household) and hide him when news of the assassination became known?