When Tony and Bishop are on the boat, you can clearly see the camera crew reflected onto the hardwood stairs.
The victim was found on the Ellipse, hidden from view in heavy shrubbery near woods. No part of the Ellipse is overgrown. The shade trees that ring the open area do not provide any kind of cover.
Gibbs refers to a river in "Hartford County" Maryland. The county is Harford.
Gibbs is notoriously anti-technology, and yet in spite of him hand drawing his sketches for Chickadee in Honour Thy Father (season 11), he has meticulously drawn and annotated CAD drawings for the boat design on his workbench. For someone who is so particular about the touch and feel of his craft this would seem anathema.