There's a long history about naming peaks and bivouac.com which I don't want to get into. But if you were to attempt an unofficially named peak (lets say Washburn) from Watersprite Lake it's much easier to tell your contact person "I'm going to Watersprite Lake and I'm trying for Washburn Peak south of that lake, if you don't hear from me tell SAR to check bivouac.com for exact location" or something along that line, rather than saying you're heading for an unnamed peak (Peak 1830 would help though) south of Watersprite. I would think that most SW BC SAR Teams have bivouac.com memberships.
On the other hand, Darling Peak near Mamquam got misnamed by bivouac (Mirage Peak) and was uploaded on google maps so if you relied on that mapping source and told your contact person Darling Peak (actually Delusion), it could cause a little confusion. It is corrected on bivouac but remains incorrect on google maps.