Logan Heights and Shelltown are a walk in the park comparatively. Im sure the parts you walked through in Harlem, SOuth Bronx, Newark, West Philly etc where of the better variety because you know the area. Throw an out of towner driving around lost at dusk in one of those places and they could get eaten alive if they pull over and ask for directions. In Logan Heights they would get directions.
And Camden aint so small. Its far bigger than anything in San Diego.