I've found Traitor's Cove and the Margaret Creek wildlife viewing area. (in Google Maps, that is.) Now I am going there in P3dv4, typing as I investigate, my sim has just loaded into the Margaret Creek location.
Looks like a dock and building and stuff over there.
Margaret Creek Wildlife Observatory trailhead and dock. LAT: N55* 42.09' LON: W131* 38.22'
Moving on, ... taking off and flying the area to look for a "cabin" at the marked location. Stand by ... umm, the Margaret Creek WO
is where the banana is at.
Approximation of your screenshot, showing the MCWO and dock.
(not really visible in my shot, but is there.) (not an ACTUAL banana) No cabin however. Is this a flight we have? I am not familiar with it. The only reference to it on
the site is this post.