Thanks Bob, and everyone's input on this.
Bob, regarding this passage from your text:
"the shotgun which breaks down and is carried in a case that resembles a briefcase should not be considered concealed if the carrying case is clearly marked as a gun case"
...the short answer seems to be that, considering it can be broken down and I prefer not to carry it through the forest wrapped in canvas (which seems comically cumbersome), that I should carry it in a backpack and label the bag accordingly.
For instance, I might silkscreen something like "Rifle Bag" onto my Ruger bag.
(Please feel free to comment)