It's contained in Pacific Northwest Scenery Collection scenery - (Refreshed 06.02.2019)
https://return.mistymoorings.com/scenery/#pLeg 05. Powell River (CYPW) - (Non-ORBX/Default)
Ray’s Cabin (RAYS) > RTMM Add-on scenery - Pacific Northwest Expansion Collection scenery
Ray's Cabin
N50 12.5441-W123 59.2581 I can see the dockage and the cabin.. lots of water and enough room to land on that we peninsula where the cabin sits.
So check to make sure you have the Pacific Northwest Scenery Collection scenery in.